The Technic Launcher is by no means dead or dying, anywhere except among your circle of friends. Have you even seen the Platform? There are almost forty thousand public modpacks on the Platform, plus who knows how many private packs. Attack of the B-Team drove FOUR TIMES the traffic that Technic staff planned for.
As for your complaints about Tekkit's mod list, Technic dropped IC2 because after 1.4 Alblaka vanished, leaving the future of the mod in jeopardy. As it turned out, the Technic team were more or less right. IC2 experimental currently says it's "unstable, may break worlds" (read: not suitable for modpacks) at the top of its download page, and IC2-legacy has seen a total of two commits since July 2013 and at latest runs on Minecraft 1.6.2. You also suggest substituting EE3 for EE2 and Project Red for Redpower, which Tekkit currently does.
Tekkit won't have Forestry because the author of Forestry attacked Technic users' worlds, and it won't have Thaumcraft because it's both a very intrusive mod if you don't want to play it (see: taint) and Tekkit is a tech pack, not a magic pack. If those mods are what you're looking for, Feed the Beast's packs might be more up your alley. The Technic team can't cater to everyone's modpack desires, though, so that's what Platform is for.
Voxel got their own launcher solution, so use it if you really want their pack. Technic SSP was useful when there were mods that couldn't run on multiplayer, but that ended with 1.4, so the team retired it. (If you really want, there are four or so on the Platform. That little search box really helps.)