The ranger (jin) has the same interrupt reflexes the enemies in this game does (can interrupt one second casts easy).
I've set her up as a ranger/mes with mostly interrupts. It's neat watching a mob try and cast a bunch of spells/skills in a row and none of them work - especially on the healers and nukers
OTOH, during the preview I picked the Ele simply because you can finally take one out in a mission and not have firestorm cast immediately. The only way an ele is ever useful under computer control is when you can control the spells they use.
For me, the interrupts were WAY better. It's better reflexes than any human and you now have a pretty good deal of control (I noticed that under their fine control menu you can tell them to lock focus on your current target no matter what - GREAT for interrupting a caster while the rest of us go after the rest).