I don't get why does the extra features annoy some of you guys. What difference does it make for you if it is only for Minecraft or not? Give or take the extras you still play the same game, you don't play in the launcher, you just use it to start the game
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People get emotional about trivial things. Human nature, I suppose. The launcher is a modpack delivery system. Can I find and download the pack I want quickly and easily? If yes, the launcher works fine. There are added features to this launcher which you can use, if you like them, or ignore/disable if you don't. Personally, I rarely use voice chat, and when I do, it won't be Curse voice, but turns out, if I don't add anyone to my friends list, the voice feature doesn't impact me, so, whatever.
Also, if, as it sounds, the packs are going to be available as direct download via the website, there's little reason to use the launcher at all (as well as making them available for Linux/Mac), unless you want to use one of the added features. For instance, I'll likely be using it to create my own packs, as it's a huge time saver versus downloading all the mods by hand.
Regardless, for many people, change is bad, so don't expect the bitching to stop any time soon.