I listened to the other remastered albums, like, once each because I purchased them for the bonus material and artwork, but I don't remember them sounding "loud at any volume." I don't think I've sophisticated enough ears to even notice the difference between the remasters and the originals.
If he keeps that same course, Machina should be fine, no?
Then again, isn't it all actually being remixed instead of just remastered? If so, yeah, he'll find a way to fuck it up with his tin ear.