Honestly I like the guitars, I don't think they sound thin, I wouldn't change them at all!Yes axefx. Please advise
Are you bussing the guitar to any 'verbs or room IRs? This was always my go to for making guitars sound "bigger".
Is it double tracked? How is it panned? (quick listening on speakers, can't tell) also vital to making that "wall" sound.
Unless you are specifically mentioning the preset.
A few months ago, I read this article about how Korn archives massive guitar. They quad record (4x of each guitar) using different amps. Then they record a single note line of each guitar. I thought it was interesting, especially the single note part.