Enjoying the pack, so far, despite a few bugs here and there.
Really would like to see some tender loving care in the form of some additions, though; IC2 and Buildcraft are old favorites and seem to fit the FTB packs so well, so it's a bit strange to not have them available, though I can understand and appreciate that the goal in this pack appears to be to present a "new" type of FTB. Thermal Expansion 3 also seems to fill the void of Buildcraft pretty well with the new features, too.
Enchanting Plus would be fantastic, though, since several mods seem to add many more enchantments, and disenchanting items from Mods isn't always easy (Mage Robes! Semi-complicated to make and repair via mana, so the repair via combine method is cumbersome). The mod author recently came back, it appears, and there are 1.6.4 and 1.6.2 revisions available, so it might be a good time to pounce on the mod and toss it in!