Perhaps you should go to the Minecraft forums and read up on the sweeping changes made in 1.7.x, let alone those made in 1.6.x before commenting on what should and/or should not be happening with FTB's launcher.
I understand that possibly some other launchers work with 1.6.x... You could go check those out if you're in such a hurry.
Nobody has had a chance to deal with 1.7.x because until last Friday (10/25) nobody knew exactly what changes would be in the official release of 1.7.x and even the Minecraft loader is still working things out with the new "Resource Pack" system. Then all the other loaders have to work on complying with the new 1.7 system. After that, unless mods take a head start and update their Mods to load as MC Resource Packs directly from Mojang first, the mods can start working on FtB (and other) launcher compatibility.
I happen to like what FtB has to offer, and can patiently wait... mainly Unleashed and Direwolf. Direwolf will have newer mod packs first because they were tested and tweaked on his Forge 2 server. See this for his explanation: