I'll go ahead and offer up my initial impressions. I still need quite a few more listens to really determine what I think.
It's very much the same sound they've previously featured, which isn't bad, honestly. Protest can't be really narrowed down to a single genre, so there's always going to be some variety. That said, it does feel too much like their previous work. Maybe some more experimental approaches would work the next time around. I'd classify this as a minor quibble - they're very good at what they do, so this isn't really a problem at all.
Musicianship is top notch, as always. Walker's vocals are fantastic. He possesses an incredible range, although I'll be the first to admit that I miss the growls and lows like on Bloodmeat and Sequoia Throne.
The lyrics are pretty interesting. I enjoy how they're a bit more realistic and personal versus the mythical lyrics we're all used to hearing. It's a different approach for Protest, but it works just as well.
Just from my multiple listens, all the tracks sound good, but at the same time, nothing stands out to me. Sequoia Throne, upon my first hearing, just blew me away. I haven't had anything like that happen, but maybe something will click soon.