I don't get this "delta" idea.
Noone would offer his swaps at FRR _plus_ some delta, because it'll be above the usual wall of FRR that will exist at FRR+/-0.
So the only way swap rates would move is downwards continuously.
Sorry that you "don't get this", but "noone" would force YOU to use this "delta" feature, so you will be just fine and you can continue staying in line, behind the 2 mln wall of FRR offers.
The main point is that "+/- delta" addition cannot possibly make the situation worse. It either does nothing, or it will help to spread the "wall" to some extend and that IS the start.
P.S. BlindMayorBitcorn, so Bitcoin is a "she"?

... I like that.