Necrons are in kind of a weird spot because of exactly this. It's incredibly easy to go all-in on defense and just rely on weight of fire to carry the day- but that's not all that effective anymore. Effectively deploying the firepower is another consideration, and a very necessary one for our little space-zombie-terminators.
Combi-flamers are going to be amazing. Hell yes I will take a -1 to fire my bolter in addition to auto-hitting with my flamer. All gravy.
Combined with the FoCs we've seen: this is going to make list building really, really important. I look forward to seeing what kind of shenanigans we can get up to.
After seeing them tack extra wounds on so many things in AoS, and apply the same ideas here: probably pretty often. Again, speculative point but I'm willing to stop trying to apply what I know about 40k to 8E for a while, it looks like a very different game to the one we've played for several editions.
This also makes multi-wound models a riskier thing as morale kills models, not causes wounds. But yeah, Tyranids and Orks are likely to get screwed by this.
Gauss looks to be the rule that will be changed the most: wounds on 6s is everything and AV is gone. I understand that it will receive a significant number of changes-but I can see tesla easily becoming the more valuable option as more hits will have high value. Again, I'm ready for the rules to prove me wrong but speculation is speculation.
The part of me that enjoys playing gunline Necrons is happy. The part of me that likes fair and balanced mechanics is displeased.
I mean, the changes to cover (and wounding) also seem to favor taking hyper spammy weapons. As Necrons: if every weapon can wound on a 6, that already invalidates gauss, and if people are going to be wandering around the bushes with 2+ or 3+ saves all day long then I should probably just run more tesla weapons to generate more hits.
Again: All shots in the dark without every weapon profile available, but it seems logical.
The cover changes are a bit mad, but I really do feel that it's going to be very dependent on how the different guns work. But I feel confident in the following: Ignores Cover is going to be even bigger than it already is, probably the main way to make gunlines truly effective.
I'd love to get Pariahs back.