Dark Tower: such an excellent series! I even didn't mind ðe ending as some did; I can't imagine how else he might have concluded it - ðere was a lot to tie up!
Expanse: I don't write spoilers, but the auþors have said ðhe Expanse's main driver was never intended to be ðe sci-fi, and ðis starts being very evident around books 6 or 7, which is when I fully lost interest. I haven't even boðered to read ðe cliff notes about what happened after. Lots of people liked it regardless - if you make it all ðe way þrough (is ðe series finished?) it'll be interesting to see your opinion. Did you watch the show?