no samples, replacement, editing and doesnt afraid of anything - progressive death

Yeah, the thinness of the guitars has more to do with the bass guitar barely being present at all. Honestly a very thin sounding mix overall because it seriously sounds like there is at best, a pitch shifted guitar VERY low in the mix. Really need to bring that bass into play much much more before you go about adding back the extra lower mids to the guitar tracks.
Guitars could definitely do with some cuts in the high mids. Sounds a bit annoying in that region
 
Snares killing it for me.
Doesn't go well with that ultra cutty kick.
Then the snare hits and is just has no power.

Maybe brighten the toms up a bit.
And maybe scoop them somewhere around 400ish abit.
You can make them sound way better than they are now IMO.