Sure, I'll play.
1) Panzer Dragoon Saga. Although with PDS, the only thing I'd want in a remake is upgraded graphics. Leave everything else (gameplay, music, voices in both Japanese and Panzer) as is. No English dub! PDS is still probably the best RPG I never played. The only reason I know as much about it as I do is through people at RPGFan. The game originally had a low print run and was on a not-so-popular console, so I think it justifies a remake more than, say, FF4 that's been getting remade to death. Enough already!
2) This one's tough, actually. I'd just love to see more 2D sidescrolling action platformers, like EmberWind. Sure, we have the Mario games on Wii, but something like EmberWind that's closer to Ghouls 'n Ghosts would be cool. Either that, or good ol' fashioned beat 'em ups like Streets of Rage.
3) Thousand Arms. What I'd want to change is in my review, but tl;dr- expand the story (particularly the backstory) because disk 2 ran out of steam, revamp the battle system into a straight turn-based one, and retool the dating sim sequences so they don't seem disjointed in places. http://www.rpgfan.com/reviews/thousandarms/Thousand_Arms-6.html
4) Like everyone else, I think JRPGs are losing sight of what made them appealing to us in the first place. Games like Radiant Historia and Legend of Heroes: Trails in the Sky gives me hope that the genre will come back to the fundamentals and kick ass on the strength of good writing, storylines, and characters rather than tired cliches and overly gimmicky gameplay systems. If you were to see Panzer Dragoon Saga now, it would still potentially be the freshest, sexiest JRPG on the block despite being over 10 years old.