I have Stronghold Assault waiting for me under the tree. I don't have immediate plans to get Escalation, but have almost gotten a Stompa and Baneblade a dozen times over the years. I have no real plans to get any of the Advent dataslits (tm Jaded Gamercast).
There's a lot of screaming about all of these all over the web and on many of the podcasts I've heard. They're concerned about more power in 40K. I agree more power is coming, but I'm not sure it's cause for concern.
I don't think they're too bad, at least from the position I'm in. I rarely play in tournaments, and if I do I'm not too wrapped up in the outcome. Heck, the last few months I rarely play, period. I've always been up for easily accessible ways to play the game, even if those ways aren't ones that interest me personally. Giant 50Kpt games of Apocalypse? Not my bag, but I appreciate it being there.