I think the only hope PHP has of continuing development is if someone big like Facebook can add some direction to it. Maybe they will but I think last I checked even they were giving up on using it for much more then a thin veneer to their back end services.
The prehistoric luddites and trolls on the list would shout down any truly language-improving proposals in the same way they always do, regardless of source.
The only way to get rid of those unwanted elements would be a fork, but that would be unproductive. The remaining thing keeping PHP so popular is how amazingly ubiquitous it is. A fork wouldn't have that advantage, especially in comparison to languages and environments that are objectively better anyway.