Good point. MSU is really useful for [Action] Objectives. You would prefer to lose 5 models' worth of shooting, than say, 10, 15 or even 20.
If Frag Grendes have Blast (and I'm almost certain that they will), Intercessors with AGLs are about to get real good.
And Missile Launchers are going to be the best Heavy weapon again (like they were in basically every other edition except 7th Ed... Something about Relentless Grav-Cannons being things that existed...)...Aside from Assault Cannons, but Devastators don't get those.
As I've said, in 9th Ed., it looks like Imperial Fists are going to have everything going for them. Of the two meta-shifts I predict, IFs counter both of them, at the same time.
Even though my Faction looks like it's about to be a meta-buster, regardless of the direction that the meta actually takes... I'm still sad.