I think Doc is good at managing personalities and giving motivational speeches. He draws up some nice plays out of timeouts, and he's got a very effective defensive system.
I'm not a huge fan of his selection of lineups and rotations. Nor do I think he's very good at coaching a team offensively. Creative and flexible are not words I'd use to describe him.
I also doubt his ability to keep a team fully focused and engaged every night during the regular season. Certainly nothing close to a coach like Thibs.