Thoughts: an alpine pack should be simple and streamlined, and of course have attachments for your tools of choice. Outside of that, I think the most important part is the fitting. I have had a pack made for me by Dan McHale, and he fit it based on a few measurements, including how long my back is, etc. Also the harness and straps should be designed to carry the load most efficiently and comfortably.
It sounds to me like you're not asking fit questions, and that just leaves the "what attachments do you want?" questions. The reason you're not getting any answers is probably because the answer is "as few as possible".
I guess one design point is to make sure you put on a nice sturdy haul strap that you can clip your pack into and yard it with that won't break when the pack is full.