Yes, Rachel Weisz would have been wonderful if they'd made a series when the books came out. A bit too old now, same with Eva Green. I was on a WoT fan page for ages back in the day and casting threads were always fun. 
I think the books have more of their own identity after book 6, but not in a good way...
Breaks are probably good. I used to do a reread of the whole series every year, before Jordan died and Sanderson took over with his writing style that I hate, so my opinion is coloured by that.