[pretender]

At the very least, GIB needs 4NT to be defined as either 2 or 3 suit takeout.

Often the auction goes (2/3M)-p-(4M)- and 4NT is undefined (GIB usually passes I think) and if I double it goes all pass a lot (whether GIB reads it as takeout or not)

The other thing I would like taken off is the jump to slam = 33+ points. This almost always means that I end up in 4/5 or 7, never in 6.

A hand I held today in a robot race. - AQTxxx AKJxx KQ vul vs nv
RHO opens 2S. I want to shoot out 6H, but know that I will likely end up in 7.
So I double, and GIB bids 2NT lebensohl. I bid 4H, and GIB bids 6C, defined as 5-9 points, 5+clubs. So I pass.

GIB turns up with xxx Kxx Qxx J9xx