Phantasy Star 3 was one I got stuck in and couldn't figure what I was meant to be doing and gave up. This time, I've realized that was actually really early in the game because they don't signpost for shit. It's a really interesting setting and concepts with the generational aspects but this game kinda sucks ass to play. Going back to 2 and iterating on the menu and battle systems in that for 4 was the right move.
I think it would be neat if PS3 got a modern remake that is actually fun and well balanced and got to flesh out the interesting ideas in here.
#1 would be making the monitor way more useful by showing you a world map that isn't a vague blob.