The BBC have given production control over to Bad Wolf (RTD's production company) and they are now owned by Sony, so money shouldn't be a problem and we know Davies is a promotion hound (he's even admitted he already planted fake stories in the press over the last couple of months to stir up conversations). Chibnall definitely took on too much writing responsibility, but the show was terribly marketed and its inconsistent scheduling definitely affected the ratings.
As for the idea that Doctor Who has "sold out", its always been a show that's pushed boundaries and spoken out against injustices in the world. If you now have a problem with it for whatever reason, don't blame the show for doing what its always done. With RTD back in charge, we're likely to get even more diverse representation and depictions on the show as we did when he first ran things.