I think Signalis is one of those games that leaves you super confused while playing it but once you're done and you think on what actually was going on, reading theories and stuff, it really grows on you
It's just so beautiful and heartfelt, plus it has yuri so it's already perfect in my book
As far as problems go I would say the gameplay itself can get a bit boring/obtuse at times (but it's compensated by everything else tbh) and the Switch version is not updated with the anniversary stuff (the expanded inventory and the like)
The ambience and the music are top-notch though
Now if you'll excuse me I'm off to see fanart of all the Replikas having fun