I do agree with some the problems you've highlighted Kim. It was a huge mistake to make Alfie an arsonist, and Kat's scars should have affected her much more deeply than they have.
I think Harry being revealed as serial rapist is a great idea (and very topical) and could be compelling stuff if written well. I guess we'll have to see how the storyline progresses but I'm hopeful it'll be sensitively done (as Linda's rape has mostly been).
DTC is certainly not perfect but I've been really enjoying EE again for the first time in years, so on the whole I'm delighted with him at the moment.