I'm not sure it's as 50/50 as you think. The search through the API is different than the web search and consistently gives the exact same results each identical search. I'm only saying the second part for anyone unfamiliar with it. This means that one that has say put their TV folders into Emby many times over, like myself, can track differences in what is caught and what isn't. I build up a library, then tear it down when I figure out how to do it better and keep working at it. I am getting close to being happy with the chosen settings. Each time I have seen what has hit and what hasn't when using the different approaches. Folder years are much stronger than not having them.
The web search itself seems to not care, but the API search, including in Filebot, does seem to. Take Backstrom for example. If you search it, you get a no doubt less popular new Swedish show that is spelled Bäckström. Now one can be like ok, search engines ignore something like that and just use the default search. Ok, I agree, but... When you put the year after it, Backstrom (2015), it becomes the number one search. The same thing with Chance, which pulls a Strike and goes to Chance!, unless you put the year.
Now I have read probably 1,000+ Emby posts, as I learned it in and out, and I have seen the developer and others mention over and over to use years in the folder names.
Here is a good example where he openly says it is used in the search. . Emby rarely missed a match for me.
Here I am right now processing 2100+ shows, with Filebot, changing to a different format. I chose not to use f3 to pick up on any recent changes or anything that felt off. I have noticed that Filebot often gets the show selection wrong when there are various similar/matching names, but that Filebot only searches with the year, which I have as part of the folder name (In parenthesis), when it is a part of the show name in the first place, from TVDB. Otherwise it searches the show name and gets the result order that you would get without the year. Now of course it is right more often than not, not to mention the order comes from the subpar(TVDB search (Which is subpar on the web and through the API). That goes without saying. We both know they could do a better job of pushing more popular results up and stop lower popularity stuff and foreign barely watched by the masses stuff from taking over the results. I have actually thought about suggesting adding the years to all shows, to make them easier to search and connect with. That would give them a more unique name and hopefully separate out the same name shows, especially since they keep dumping more English names of non-English shows, which then end up matching with other shows, and wreaking havoc.
So I just did This Life and I got the wrong one, then I chose to add the (2015) in a test through the Episodes tab search and without it as well. Without it I got the wrong This Life, but with it I got the correct one. Same thing for Blood and Oil (2010). Out of order unless the (2010) is used. Same for After Hours (2010), The Code (2014), Dominion Creek (2015) and every one I tried, except Crims (2015), which has a poor name to test and would have popped the question of which, either way . It goes on and on. I even notice less results when the year is used, but more accurate ones. It drops some of the weaker matches.
I see Filebot hit on most results and not ask me, sure, but when it asks me what I am looking for, the difference between the date and not having the date is very, very noticeable. It seems to work, on the API search (Not the web one, which is horrible.), to specify exactly which one you mean. After using Emby on thousands of shows and Filebot changing formats many times and on thousands more shows over the years, I can tell you straight up that I truly believe you may be underestimating the difference maker the year can actually be. Perhaps run your own tests, any time something pops off that has two matches of the same name and gives them out of order. You would know better than me if it would serve Filebot well or not. Maybe consider giving an option to include year, if found, when searching, if you find it suitable. As far as I can tell, it would improve top matches and overall results quite a bit. Maybe your tests will find something different. Who knows. I watch many shows that have the same names and often the less popular ones and the more popular ones, so I see this non-stop. It can get to be quite annoying.
Also on side notes. Emby is quite a bit stronger than Plex with local media, so maybe they worked on making use of years for increased accuracy. I have used both and found Emby to be considerably better that Plex for that. Obviously Emby can't do streaming to save itself and Plex has its strengths, but also its mission goals, too. Which are very different. I have ran them side by side in the past, though I find myself never having a need for Plex.
I also use NFO files and have the correct metadata sorted as best I can. I just wiped them all out, as I always do, in order to redo it to make sure all of the matches are accurate. Once I have them settled, I will finalize another batch of created NFOs and images and hopefully be done with this. I have been working on getting this collection as accurate as possible and have learned a lot along the way. Every single file matches TVDB and Trakt, not an episode missing in the middle anywhere, completed seasons, highest quality available for each... I just got stuck on trying to lock down the final format before I put them back in Emby for hopefully the last time. That is how I ended up here.
My head is starting to spin from staring at so many shows as I change the format... Filebot overload.