Tactics guru (and Arsenal fan) Michael Cox has done a great writeup of what Chelsea might look like this year under Mourinho. (Btw, if you are interested in football tactics, Zonal Marking is a GREAT read.)
His writeup is a fascinating read, and what I found particularly interesting is that he says that while Mourinho wants to develop Chelsea into a counterattacking side, he lacks the deep-lying playmaker to be able to make the quick pass to transition defense into attack. (Sound familiar?)
There also seems to be the recurring theme of Mourinho lacking trust in certain players (Mata, Luiz, Torres, Ba) and preferring the older players that he's worked with before (Terry, Cole, Lampard, Eto'o, Ivanovic, Cech). Mounrinho has continued to call his team "boys", despite the fact that he has quite a few players who are older and from his previous managerial spells (the 6 aforementioned players, Essien, and Mikel).
Also, why he signed Willian is still a big mystery... But, lolSpurs?
Lukaku on loan is also another headscratcher.
It seems to me that the deep-lying playmaker problem could be solved by playing Oscar as a central midfielder, as he does do work defensively, but his movement in the 10 position is one of his great qualities, and it seems like Mourinho really likes him. I also found it interesting that there's no mention of Marco van Ginkel, who could also do a job in deeper midfield.
Anyway, it seems like Chelsea look good on paper, but it's not a typical Mourinho squad, and who knows? Maybe Mourinho will struggle to get the best out of them...