I don't see how these changes are bad
2s cast times means you can slidecast more efficiently
Triplecast now becomes a mobility tool
Not worrying about a clock ticking down means you don't get bricked out of your cast if you miss it by <1s (And also helps if your ping is high, or if you lagspike)
You could argue that you lose "class fantasy" but IMO, this is closer to what Black Mage was in other single player FF games: A turret that casts F4 every turn until it runs out of mana