IMO to fix it :
1) the show needs to not revolve around the f**king companion all the time like it has done constantly since "Rose".
2) Better more interesting companions, have a japanese onna-bugeisha, an alien or even just someone thst isn't from comtemporary london.
3) Better monsters, proper bizarre and non-humanoid creatures, DW gave us the daleks so there is no excuse for the poor, unimaginative crap they make. Hell, I'll even work for free for them :P
4) more sense of ADVENTURE, it's just felt like a bad soap drama for ten years. More alien worlds, more focus on other cultures and civilizations. The Hartnell, Troughton and Davison eras all accomplished this just fine and with their excellent production standards could do so again.
5) Coherant writing, would be f**king nice.
6) Fresh writers that are not fans and for god sake employ more women, DW is such a damn sausage-fest.