The question for me is: is WotC ready for a new edition?
Are they up for the job? That I'd like to know. We fans are poor judges of that. I hope that at least WotC themselves know.
I remember shortly after 4E was released Mike Mearls was asked in an interview if 4E was basically released because WotC needed the money. (Heart warming, the sheer naivety of some interviewers.)
I remember his reply was to laugh and say that few people have any idea how much work it is to produce a new edition. It's not as if WotC could produce new editions on sheer whim, just to get some quick money.
And I think he was probably right. It takes a LOT to produce a new edition of D&D. So much went wrong with 4E, not even so much as a game (though there's also a lot), but also with the way it was rolled out, marketed, and pre-release playtested. It seemed not so much too soon (though it was perhaps also that) but also too hasty. From skill challenge DCs to MM 1 damage numbers - a lot of 4E comes across as unnecessarily half baked, as a rush job. As if the skill or resources weren't there to produce a more solid core product right out of the gate.
But here's the catch. Compared to 2011, WotC had bigger resources back then, and a better, much larger D&D team to rely on. Look at the interior front page of your PHB 1 for the 4E credits. See how many people were involved? Dozens. Who of these is left at WotC today? How many of these people, some with jaw dropping track records, were replaced by interns or leftovers, how many of their positions even were filled since 2008? Where is the manpower today? Where is the promising new blood?
It's impossible to tell as a fan or customer, but comparing the situation to 2005-2007, when WotC hired crazily left and right, the current situation doesn't tell me so much that I am not ready for a new edition - but that WotC isn't.