If we take everything from the most formative years of the characters as "the basics" then the marriage isn't part of that equation.
When people argue they want "back to basics" what they usually mean is back to a previous status quo, usually the one they grew up with which is perfectly fine however most of the time when creators attempt to take that character closer to a previous status quo it never seems to work.
Renew Your Vows is supposed to be a throwback to the married years of Spider-Man and portray the road not taken by Marvel re: the marriage. I feel Slott's original mini series captured this well however the ongoing series does not really feel like the married years and I don't think anyone back in the day thought that Peter and MJ and an offspring would end up fighting crime as the Spider-Incredibles. It's much farther from back to basic Spider-Man than anything that Slott has done. Obviously we know why Conway has gone this route since the idea of MJ as a costumed hero herself has gained some popularity and it's an easy way to keep MJ (and Annie May) active rather than stuck at home waiting for Peter to return which is something a lot of writers struggled with in the original depiction of the marriage but we shouldn't kid ourselves that it's anything but a unique and very different take on the marriage rather than capturing what fans liked about the marriage the first time.
Likewise Spectacular Spider-Man was supposed to be a book that followed more traditional Spidey stories and yet so far with it's broad comedy and abundance of guest appearances and cameos of other Marvel characters and a story revolving around Peter's surrogate sister it doesn't capture the feel of the pre-Parker Industries Spider-Man. Again I would argue that this seems even farther removed from traditional Spider-Man than anything that Slott has done.
Peter Parker should really already a well known name in the media. He went on a book tour promoting Webs and If we're being strict you can't really escape the fact that he was married to a internationally famous super model and actress. Of course writers don't have to be strict about this stuff and have played down just how famous was during the ill fated Byrne/Mackie days just as I'm sure future writers even Slott himself will inevitably play down how much of a house hold name Peter is.Well, I was thinking about Dan Slott's run in general and I haven't been exactly following new developments that closely. Things do cycle. However, I'm sure comic series where Peter Parker is a household name due to being a failed Steve Jobs is how I would define "back to normal."
The one thing to understand about Slott is that he's a company man. If Marvel today reversed their position on the Spider marriage Slott would gladly write a married Peter Parker - heck he did write a married Peter Parker in the original Renew Your Vows series and fans didn't get a sense he was against the coupling in that story. He would also say whatever it took to promote his married Spider-Man stories.
But Marvel's stance is that they (currently) do not want a married Peter Parker and so Slott will write an unmarried Spider-Man and say whatever he feels best to promote his stories. It's as simple as that.