I've reread both Wolf Hall and Bring Up the Bodies so often that I could probably reproduce sections from memory, but I haven't reread TMatL since reading it when it came out. I think it's the least brilliant of the three by some way (though Mantel's 'least good' outstrips most writers' peak by a long way in most cases).
I think in part for me it was purely that part of the charm of the first two books was the fizz of following a character who is simply so good at his job/s. The man is on fire, managing to juggle everything, make himself obeyed, master great tracts of learning, keep ahead of court politics, learn several languages, keep on eye on what's going on in the kitchen, be a concerned and loving father and family man, be endlessly loyal to Wolsey etc etc.
Whereas so much literary fiction deals with failure, powerlessness and disappointed hopes, when Cromwell starts to slide, to be aware that his power is failing, he's falling out of favour, there are meetings happening without him etc -- it's a much more familiar narrative. And of course you know what's coming.
I also thought Mark Rylance (who I think is an astonishing actor) was totally miscast (as was the brilliant Ben Miles in the RSC dramatisation). Cromwell needs to look like a bruiser. You need someone who looks more like Ray Winstone.