I hated FFX, and to this day it's on my top 3 list of worst FF games ever made
Thats a very unique list you have there Ringo

I have to go 50/50 on this On the one hand yes a remake would be good, but FFX had its time, also whats the point? S-E has enough to do as it is, and Quality games are a rarity these days.
Some improvements they could make are to merge the 2 blitzball systems together creating fully controlled real time experience instead of one or the other.
Make the Battles real time?
Increase monsters levels as you grow on the Sphere grid.
Put in all the Hidden location from FFX-2 into the new FFX game to make side quests longer or provide more of them.
No fundamental changes to the stories would be made, but then again look at FFVII

So why its nice to think of this being touched up and formated for the PS3, id much rather have a newer experience of the same caliber.