Dunno about the quality of PS2 games on PS4 (I only have two PS2 games but on PS3).
I would take them instead a random space shooter, but not because I hate indies (90% of my Steam library is indie titles), just because actually those games are Sony's exclusive in most cases and I can't take them in other stores/networks. I don't own a PS2, so having access to Dark Cloud etc would be great, at least for me.
But Sony priced those games like 15€, I doubt they will give them around soon.
The fact those game are not 60Hz is a scam, anyway, because even PS1 titles had a label stating if they were 50 or 60 Hz, like Resident Evil 2.
Today should be the day, prepare to cry.