Spoilers for dungeon names and content since the thread doesn't have a warning in the title.
I felt like the two towers were really repetitive. They kind of had no way around this because they had to wrap up the whole story they started with Fandaniel in 5.4, but I felt like we already understood most of what we needed to about these things back in 5.5 and didn't really need to trek through two of them out of only 5/6/8 leveling/story/total dungeons this time. Vanaspati also felt really boring to me for similar reasons - I know they wanted to drive home that the calamity has come to the present day, but it just felt like "oh, more of the mouth monsters from Amaurot."
On the other hand, I really liked all the dungeons after that, and The Dead Ends is almost as good a story-ending dungeon as Amaurot was last time. Getting to do Ktisis Hperboreia with the non-Scion trusts was also really fun.