I'm not sure why they're calling it an "announcement trailer" as it's been known to be coming for a while. But I guess it works for people who haven't been paying attention
It announces all the not-new-at-all stuff! I do think the additional 'mechs will help make the OpFor feel more full and varied, and the additional weapon variety will certainly help and fix the feeling of distillation among the weapons. Still, I can't help but feel like the additions advertised are an "about time" sort of completion of the world.