One major idea for improvement to keep in mind for future reference is more battle animation. If you look at the real reason Final Fantasy has gotten so big, it's because of it's detail in battle animation. I can't get over the fact that nobody moves when taking damage and It's pretty sad that everyone's attacks only switch to one other frame before returning to there dull statue stances. Take 'Linion RPG' for example. Lots of fluid movement makes fights also more exciting! Sometimes some anticipation also builds as players wait to see what the characters will do as they learn new skills! The success of 'Cabal Online' also has Fluid Exciting battle animaton to thank for keeping players on the edge of their seats in PVP and PVE.
I hope you take my Idea into consideration and I have more too look forward to in later games.