I know that afterlife scene is just metaphorical but i don't think it fitted the theme and tones of this manga.
I'm glad Floch in the end went down fighting for the island, instead as the fascist oppressor executing people on roofs he was portrayed some chapters ago.
Yep, that fort is likely where the final showdown will take place. If this was an ordinary manga by an ordinary author i'd say Eren will be stopped somehow, but i'm not sure it'll going down like that.