I agree that fueling with the stock arrangement is slow if you want a full tank.
However, I have started flying aerobatics, and I can fly the whole 2016 IAC Primary sequence without the engine missing a beat with less than a half tank of fuel.
I do have AIrflow fuel injection, but I don't have a flop tube nor an inverted oil system.
So the small rib vents might be helpful keeping the fuel around the pickup?