I think your right on with everything you said.
This offense has the skill positions set. Still not sure about the line, but the zone blocking they went to last year seemed to help a lot.
I wasn't so sure about the Mcluster pick when it happened, but now he's the guy I am most excited about, he could be what makes the Chiefs offense truly explosive.
The defense should be tons better with Crennel calling the shots. Also the young d-line will have another year under thier belt. Throw in Berry and an offense that can stay on the field, and things are looking pretty good.