As I said before we don't know which episodes that aren't recorded as written by RTD but were completely rewritten by him, something he freely admits to doing but for contractual reasons (probably) he can't disclose which ones he did.
Large chunks of RTD dialogue were dropped into stories by other writers to feed the build up to his finales which have got progressively worse with each season.
When people credit RTD for bringing back Doctor Who they tend to forget that Rose (a really awful episode only made watchable by Ecclestone's performance and the novelty of having the show back) did just as well (in terms of viewers and audience response) as the Paul McGann movie and the show at it's lowest point (budget slashed to next to nothing, stuck against Constipation Street with a BBC Director General desperate to kill the show ) was still pulling in the sort of audience figures that Torchwood or The Sarah Jane Adventures get now.
The person who really brought the show back was Julie Gardner who cut through the red tape holding back the nonsense of not bringing back a show that should never have gone away in the first place.
The British public always had a love affair with the character and the show, the viewing figures only went down when it was poorly served by the BBC (red lights should have been flashing when Michael Grade started his antiWho campaign when going out with the lead actor's estranged wife).
Somewhere there is an alternate universe where the show came back without RTD and I dare say it would be just as successful.
Somewhere there is a better alternate universe where in the mid eighties the production team wrote stories that could be made with the budget they had without the look and feel of panto and it never went off air.
I don't loath RTD as a producer (he has been great at maintaining a high profile for the show and securing funding) or even as a script editor but for someone who went out of his way to write the bulk of the stories during his tenure he just isn't that good a writer of stories, especially when fantasy/science fiction gives him an excuse to drop the ball in terms of story logic ( he is sometimes great at dialogue though).
Pointing to the Classic Who Hall Of Shame doesn't let him off the hook, I'd rather watch Timelash for all it's silliness than something as teeth grindingly awful as Journey's End or Last Of The Time Lords.
Other news :
http://www.seenit.co.uk/tom-baker-discusses-return-to-doctor-who/073872/