I liked it, too. But they did tell us this wouldn't be a dream or part of Booth's tumor or anything..and they went back on that. It wasn't happening for real as we were all but told. Since it was Brennan's book it was Brennan's fantasy.
Loved seeing the alternate universe and all the characters in oddly similar roles. Zach...I miss him.

It was kind of a letdown for a finale...more a filler episode, and the backlash from the misdirection of all involved is big.