Listening to mix 3. Meant to listen to this earlier but got sidetracked and missed it...
Everything sounds great to me. The slapback sounds really good here. Not sure if you brightened the rhythm guitars since the first mix, but I think they sound fine. The mix overall could maybe be a little crispier, but sounds great as is. A few db of 12k on the master bus would do the trick, if you haven't tried that already, or maybe even on the drum bus. Again, still sounds good where it is. If you have the Slate stuff, try some Lift or Revival on the master bus...
The last chorus, the vocals seem a little softer than the rest of the song for some reason. Listened again to make sure, and yea, they're a tad softer there. Not sure if that was intentional or not, but I noticed on both listens. If anything, they should be at their most prominent here as it's the last moments to convey the song's message.
All in all, great mix. Other than brightening the mix a tad as a whole and turning up the vocals a hair in the last chorus, it's spot on to my ears. Great recording.