I liked Will a lot, his heart is in the business. What a shame about Klingbeil. Avante, huh? I'll have to check them out.
Riedells always fit very snugly, but they will mold to your foot. Especially if you ordered a stiffer strength boot. They'll never fit like a pair of Bill (not Don) Klingbeil skates - comfy from the start. With Bill gone, that era has passed. (after three pairs of just-okay Klingbeils, i switched to SP-Teri skates.)
With the new foams and padding, sometimes boots that feel too tight initially turn out to be fine once they've been broken in properly. My stock SP-Teri's were certainly that way.
OP - return them. You have it in your mind that these aren't the skates for you and you've been complaining since before you received them because of the shipping delay. Might as well get what you want now, so you won't feel like you settled for something lesser. The time has already passed, what's another month or two? I know people who are just dying for their current skates to break down because they settled.
In fairness, I know many skaters and coaches with custom Riedells who didn't have the issues you've experienced, so I can't assume that your situation is the norm.