I enjoyed the anime end cliffhanger actually, because TMM is such a story where it would have made me very sad to see it be closed forever. I didn't even mind the new enemy much.
I have more problems with the anime final beforehand or mostly with the conclusion of Deep Blue's plotline. Ichigo NOT being the one to defeat him is an aspect of the manga I truly enjoy. The idea of him having to be defeated from the inside, from his counterpart rounded it perfectly and gave TMM a kind of realistic touch somehow.