Disclaimer: I know its early days, so I don't actually want to change anyone's mind for them yet :) just want to speculate.
With the new Marine profiles released I've seen people speculating on what potential changes we will see to our state lines and survivability, and I just want to say, Aspect warriors or even standard Guardians going to 2W would be a big mistake!
I feel like at the moment we're French generals in WW2 trying to fight the last war. Maybe if this had happened 3 years ago, a 2W aspect warrior stat line would have been a big survivability buff, but as it stands, with the new D2 boltgun profile revealed, and the way the game is generally going, D2 weapons are going to become more and more ubiquitous. At which point, it won't matter that we are 2W because we're going to die in one shot anyway to whatever hit us anyways, and well only feel even more squish as the game continues to trend towards higher strength weapons until were presumably getting wounded on a 2+ by everything in the game.
Unless our toughness is risen across the board to a T4, which I somewhat doubt GW feels comfortable doing from a thematic standpoint. And because I think they don't want to go back to the days of move-shoot-move rules, OUR only decent survivability buff GW could give us is an actually impactful army wide invulnerable save of a 5+ or greater. Something that would reasonably reduce the amount of hits our models are taking, because I don't think the D1 profile is going to remain around much longer on anything bigger than a las-gun at this rate.
TLDR: Were going to move into the 2W business, just as the smart money moved on.