6.0 was choppy due to having a few different writers on board (and presumably Yoshi-P editing).

6.x was filler to get Dawntrail written, and Dawntrail itself might end up being filler to get 8.0+ scheduled out.

That said, 6.x was... not very good. Slow start, interesting premise, but they wasted it on a trite aesop and predictable plotline. Golbez and the Archfiends were great, but beyond that it was dull and repetitive. Heavily reliant on IV nostalgia too, which just doesn't work for me. (I only played the DS version... and didn't finish it because it was so hard.)

I'd say to temper your expectations for Dawntrail - not because it'll necessarily be bad, but because it's clearly not going to be a gritty, dark, world-shaking story; and just because something isn't to your taste doesn't mean it's bad.