Think the last few shows have been fairly decent. Arguably better than anything the old 3 had put out for the past 3 or 4 seasons.
That's not saying they can't improve on a lot, more the "old" show was so tired it needed the change but there's definite signs that the new folk are starting to get to grips with it and get more comfortable.
Very noticeable Chris Evans toned it down a lot this week, he was much more tolerable, seemed to take a little more of a backseat and let Matt Le Blanc (who continues to impress) lead a little more. Definitely didn't feel as "look at me, even when you're not meant to be, just look at me anyway".
Chris Harris undoubtedly the star of the road tests, would go as far as saying he's even better at them than Clarkson, Hammond and May. Hell, even Rory Reid is putting in a decent impression (albeit i think he's trying just a touch too hard at times).
If Chris Evans takes last week as something to build on, i think they are onto something longer term, series should definitely be judged at the end IMO.
Sabine is a bit.... rubbish, though (but needs time) and Eddie Jordan is clearly being asked to act, and he never will be an actor and is struggling horribly to get to grips with it all (albeit he was pretty funny last time he was on making a mess on the 4x4 road trip test).
As for SIARCC.... i skip it on Iplayer (i might feel differently about the whole thing if i watched it, forced interviews just don't interest me).