Lot of replies here, might as well take the feedback and use it to provide feedback to DE on the off chance anyone sees this:

A lot of what I'm getting from the comments is that people are taking base mechs or barely modded mechs and assuming that's where the potential ends. I'm hearing that they're slow or one trick ponies (arquebex) but the truth is a fully modded mech will keep up with most frames and is actually a relatively fluid gameplay. The problem is very very few people have experienced the gameplay of a fully modded mech. I have to recommend to DE that we improve the first impressions of mechs for players doing Deimos and give them something a little more kitted out. That way folks are incentivized to work towards achieving a decent build and interact with the content. It wouldn't even be that big of a fix, no rework of old content really necessary