I use a controller and personally I don't see what people are complaining about (especially with the convenient arrows next to your resource bar that shows if you are moving or not). My main was going to be Bard with this patch but after playing around with the different jobs, I have settled with Black Mage. I absolutely love the new interrupt mechanics, I love that I can actually move out of an AOE attack without being stuck mid cast and being animation locked inside of it.

It's just weird to me seeing people complaining about something so basic. I think FFXIV must have been the first MMO many people have played, because this mechanic is present in most other MMOs. If anything, it was even more annoying in XI than it was in XIV, I remember stopping to cast in XI, getting mid way through the spell and then it being interrupted because I didn't wait long enough to start casting. At least in XIV they won't even let you start casting a spell until you are completely stopped.

This is just something that people have to get used to. Change happens, it has and will continue to.