I actually liked the battle system in 1.0 but looking back at it now it does seem a bit slow. I'd prefer to see something a little more between the two positions as I think the new system works better for some jobs than others. I prefer BLM how it is now for example but think MNK played better in 1.0 than 2.0, kinda think drg did too but not as much.
Overall 2.0 is a much much better game than 1.0, but there are one or two things I preferred the old way.