Did the balance update end up coming out? I've been waiting for it to come out before I played YIIK...
No idea. I beat it a while back and asked on their discord with no answer.
EDIT: Checking their discord, the answer is "no".
I'm late to this, sorry.
As far as I know, the balance update "silently" came out on Jan 28th, 2019.
The reason why I call it silently is that they announce the patch on Twitter, but not they did not announce it on their official website, official blog post nor Steam's announcement page.
Because of that, some people legit though that [PC Version] hasn't been updated since February 2019 and was waiting for the patch to come out on all PC Platforms so that they could buy it (or redownload the game).
the worst part is that, as of September 6th, 2019, the GOG Version hasn't receive any updates since then. (and by any updates, i mean GOG Version is stuck on the Day 1 Build of the game)
But, there's good news, Ackk Studios is currently working on a new patch that plans to make significant gameplay improvements and plans to be released on all versions of the game. Hopefully, GOG Users will get the patch.
Otherwise, YIIK will have to be added to "Games on GOG that is outdated compared to the Steam version" List.