I think it's safe to say valve is not gonna do anything and revert the removed features in Process Hacker
Valve have stopped blocking Process Hacker since the 6th of April 2018
1) You need to update to the nightly build branch:
2) You can still be blocked/banned for using older builds of Process Hacker or some specific features.
3) DO NOT use the following features while ingame since they can trigger a VAC account ban:
The module tab -> Unload menu.
The environment tab -> New/Edit/Delete buttons.
The memory tab -> Read/Write memory option.
Warnings dialogs have been added to those options! Make sure the Options -> Enable warnings setting is enabled and you can safely use Process Hacker while ingame (provided you don't ignore those warnings and use those features).
If you're still having issues with VAC and running Process Hacker: Please email email@example.com
with your username and/or SteamID and we can forward the information to Valve and resolve the issue