there's lots of things i would have added but there's millions of things they have that i would never have thought of so my following suggestions are made kindly.

1) trading sequence(s)
2) optional dungeons (one with a fire arrow and one with ice arrows)
3) lol at least 1 more shield and tunic. and armor that runs on money = 2 thumbs down
4) Lanturn should consume fuel way slower so you could keep it out almost all the time at night.
5) the bosses are epic enough we just need them to be harder/stronger/smarter.
6) no sections in the castle town please. its so annoting to have to load 3 screens when going through the city.
7)more sidequests like the one with ilia's memory.
8) items should be used again even after the dungeon where you find them.
9) i am not a fan of the howling music thingy so make sure there's an instrument.
10) more items should now be found from beating an enemy who wileded it like the guy with the ball and chain in TP.