In the same boat here. The C ring hold me to buy this frame !
Wondering if VB change the c ring in the recent frame sold
If the C ring is the only thing holding you back, there are a few easy fixes to solve it. I bypassed it all together with a different compression ring that came with my handlebars (The One Pro). The Tarmac SL7 ring is another option at like $30USD. Granted, I get that it’s super annoying to have to immediately replace a stock part to get the bike rolling, but that’s what I expect when you’re paying $700. I also immediately replaced the rear derailleur hanger because I think the stock one is unsafe but that’s just me.