No kidding he needs to go.
I think what has been shown is that Davies needs someone to say 'no' to him, and there doesn't appear to be anyone who can do that on DW. The writing has too often lapsed into lazy one sentence unformed ideas followed by <insert lots of effects here to distract with shiny stuff>. Giant bone beasts, guv? Sure, but let's not actually make them attack anything, instead they can stand around like dinosaur-sized targets so they can animate a UNIT rotating turret.
Episodes have repeatedly run out of steam - look at the Tennant/Tate triple - too much for the time, too little for the time, too little topped up with his utter unwillingness to actually permanently put an end to characters (not least his besotted obsession with Rose Tyler). This has to be down to the writer (Davies) and the showrunner (also Davies).
Almost the single worst thing he came up with was the first episode of the series, where the Doctor was an irresponsible obnoxious stalker, 'babes'ing around everyone (imagine Matt Smith's Doctor calling Clara 'babes'!). He fused all the power in a hospital with no comeback or remorse!