Personally, I don't really care about the timed exclusivity. I'll get the game some time after it comes out on Switch, and if I have to wait months or an extra year or whatever, it doesn't matter to me. I played the first game five years after its release, and I can't say when I'll play this game. It's not like I won't have other games I can play in the meantime.
I think some people are a little too impatient.
Apparently, the issue with PS1 and PS2 classics on the PS4 and PS5 relates to the trophy system. From what I gathered, every single game on the PS4 and PS5 needs to implement trophies, so PS1 and PS2 games need to have trophies added before they can become available on the newer Sony consoles. Since adding trophies to old games is a big pain, no developer wants to do this, since the effort isn't worth what little money the PS1 and PS2 classics generate (especially if purchases of PS1 and PS2 games carried over from the PS3/Vita to the PS4/PS5). That's why developers prefer remastering their games for the PS4 and PS5.
If this is true, as someone who believes Trophies/Achievements are total nonsense, I think the situation totally sucks.