Also we aren't playing modpacks, go watch some of the streamers who are part of the test team. They lose days of work, sometimes entire worlds sometimes multiple times a day. Testing does not equal playing. Its long its tedious and we can't just focus on our favorite mods. We have to try alll the mods and then combine them and see what fails.
actually, I did and that's how I found out that I'm pretty much doing what you describe. I got Modular Power Suits to work in Ampz, I also got liquid conflicts fixed, and figured out how to disable certain mod's ore generation so that i didn't run into a gazillion pieces of silver. Although I must admit that one wasn't that difficult because I actually read that author's install guide, which tells you exactly how to do it.
Now, I'm not saying that I can do everything that you do, I'm just saying that you can do it on your own if you are willing to read, crash, fail and start over sometimes. I love problem solving, so actually what you all were doing on the stream is what last month's minecraft gaming was for me. -Install a bunch of mods one at a time until the thing stops working, read the code, try and figure out why, change it, reinstall, test again. All I am saying is that if you really wanted to, you could release the configs and whatever else to make it work on 1.6.4 and update it when you find something wrong. Like I said, I have no Java, or programming experience, so there's no way that I'm going to be able to do everything you do, but I at least got to play with the new mods, until ATLauncher got TE3, which is what I thought was the hold up for FTB, but after a few days it became clear that this wasn't the case.
Your ideas moving forward with the new launcher are fantastic, and it will be amazing once you get it all done, and it sounds like everything will finally mesh and we stop having the problems that we had with ampz and voltz, before I ever even new what a config was.
Also, I received a degree in graphic arts 13 years ago, so it was interesting hearing you speak about updating your textures. I myself took sphax's grunge pack and updated it by hand to work with 1.5.2 and 1.6.4 and it looks freaking awesome!!
Anyway, I didn't mean to belittle the work you are doing, I just wanted everyone to know that it is possible to do it on your own if you are willing to take some risks with your worlds.