Honestly just enjoy the better episodes of 7 to BTE and all of series X. Just enjoy the fact that in the 2010s 25 years on from the show's pilot there is new RD. True, it's not as amazing as the first 6 series but if you don't compare too much and just enjoy it in the here and now, X is a very good series and the closest we've seen to Doug Naylor-solo RD resembling anything like the show's 88-93 peak. Also as you say despite the really terrible weaker episodes of 8 and the lack of humour in 7 and 9 Doug has done a fairly decent job and probably if Grant had stayed on instead of Doug we would have seen a similar result. But anyway it is impossible to know but with the prospect of a series XI I will still adore series I to VI but will also really enjoy the fact that there is hopefully new RD all these years on. But yes the two co-creators sharing the writing did ensure that there was nothing too silly and that not a single line was wasted. But anyway hopefully XI can hone the style of X further and I am very much looking forward to it.