Hey latanielvss, that's a great sounding mix in my opinion. You brought the vocal out nice and upfront, which I appreciate. A lot of the other mixes I checked out had kind of buried and raw sounding vocals. However, the mix sounds a bit scooped to me overall, making it a tiny bit abrasive maybe? My original master is maybe a bit on the dull side in hindsight (I'm still KICKING myself for the dumb routing mistake that ended me up with just one overhead track) but especially the stereo guitars here I find a bit abrasive.
Regarding the mono / stereo discussion: obviously if the mix starts sounding phasey and wrong once you collapse it down to mono then there's a problem, like too much artificial stereo widening on individual elements or the master. Other than that, most metal productions have this "issue" where the guitars reduce quite a bit in size once you go mono. Most metal productions these days use similar or the same tone for the left and right guitar simply because they're meant to be perceived as one particular instrument. Or in other words: the stereo guitars serve one particular functional in the mix, as a unit. Of course, if you choose different tones or even different performances for the left and right guitars, then that's gonna alter the stereo perception dramatically, but that's not really what we intended here. This is more of a "wall of sound" situation, where the guitars are supposed to hit you as one unit together with kick and bass.
Also, think about the listening situation. Since Pop or EDM mixes will likely be listenend to in clubs or other mono listening environments, mono compatibility is fairly important. Metal, and in particular whatever genre this track is (industrial? we don't even know ourselves), is probably gonna be enjoyed by a fairly niche audience. The most mono this track will see is someone blasting it at too loud a volume in their car stereo. Otherwise, this will live in headphones and home stereo systems of a, on avarage, somewhat audiophilic community (metalheads can be an awefully opinionated bunch wrt. sound quality). So I'd certainly optimize the mix for stereo playback.
With that being said tho, the DIs are provided so you can take this anywhere you want. Those are just my five cents with regards to what we thought during production.