I have been working on my own 1.5.2 pack for a while now and I have to say the FTB team has had a few major road blocks to the update. NEI has issues and still does as of right now. Finally chicken bones fixed most of it but in doing so nei plugins needs updating. extra bees is behind forestry and xycraft doesn't have a 1.5.x update out at all. Mystraft is not ready for 1.5.2 so there are a lot of road blocks. IMO we should see a pack out soon without mystcraft. Probably when the nei plugin is fixed. Modular power suits is the primary drive imo for 1.5.2. A lot of features were added and its amazing. Power suits needs forge 700+ and nei plugins isnt working with a version of nei that works with forge 700+ Its a real issue imo. I am using a custom chickencore made by a fan from the minecraft forum. Its letting me use the latest forge but its far from perfect. Definitely not major release ready... So basically what I am saying is be patient and dont underestimate the difficulty in getting everything perfect.