I don't believe Doctor Who would have made quite such an impact if it had come back with what we have as series 5 or 6. RTD's overhaul was necessary and I loved the street-clothes look of Eccles Doctor and the idea of expanding the companion's role to include their friends and family was inspired - Jackie, Micky and Wilf are a big part of the success of the new series. David T did something incredible with the role - he made the Doctor "sexy" in a trendy, boyish way and he definitely advanced the character for a lot of viewers who wouldn't normally have bothered with such a boys-only program.
I wasn't too sure about Matt Smith - he seemd too young and series 5 looked cheaper than we'd become accustomed to but I went back and watched them all again after the series had ended and enjoyed them a lot more - I think that - in part - it was about seeing him as the Doctor and not Matt Smith.
Is Impossible Astronaut better than Rose?
No - even though Impossible Astronaut and Day of the Moon are my all time favourite episodes, they come from a different place.
Rose wasn't just a series openner - it was an introduction to the entire cast for everyone - and to the entire Doctor Who concept for some people. It was lumbered - for want of a better word - with the task of balancing us old timers and the new kids on the block and of justifying the gamble of pre-financing a series that had run out of steam years before (long before it was cancelled in many people's opinion).
It might seem strange but this is the first time since the 2005 "come-back" that we've had the same main characters as the previous series. Series 1 was completely new, series 2 had a new Doctor, series 3 had a new companion, series 4 had a new companion and series 4.5 (what happened there???) was all over the place.
Bottom line for me...
Moffat has taken Doctor Who in another new direction. In many ways it's nearer to the 60s/70's version than RTD's but it's faster paced - which modern audiences prefer. I'm now totally "into" Matt Smith's Doctor and the Amy/Rory married companions twist works for me. The only thing that make it better for me would be to see a lot more of Canton Delaware - and get rid of the garish hunchback Daleks cos they're just nasty