No. Even if we did, there would be a vocal minority that claimed it was completely broken because ____.
No, we don´t. But eventually will happen.
What I fear the most a "5.5" edition or something like that.
The ideal next step, in my opinion, would be for WotC to finally deliver on the promise of modular rules that they kept trumpeting during the playtest. Rather than a new edition or .5 that replaces 5.0, they could release optional rules hacks that could be used to sort of build your own 5.x, or stick with 5.0 if you prefer.