I'd like to have seen Cpaaldi with a different EP.
I wanted to see Matt Smith with another executive producer, and I wonder what David Tennant would have been like in series 5 (or Matt Smith's proposed "two Doctors" series 8). Alas, we don't live in those (more interesting) alternate worlds.
I now wonder if Capaldi and Moffat will leave at the same time so that the next producer can start fresh with a new Doctor and a new production team.
If so, I would like to see a beginning sort of like "Rose" -- rather than beginning with a regeneration, we're some unspecified point after a regeneration. Maybe Capaldi's era doesn't end with a regeneration. (I actually thought RTD was going to do this with Tennant.) And when the series picks up again, we're well past that. This would be a clean break with the past and a jumping-in point where new fans can join. This would be bold, different, and non-traditional -- and I'd love it.