The CBM IR will retain the present IRT, which in turn means that very few
people will be able to take advantage of the proposed zero-training IR
conversion option
CB means "Competence Based", not "zero-training". There are some tweaks to the IRT coming and some already in place but not properly implemented in the training system. I think the general trend will be an IRT which is less dependent on the ADF work, uses more GPS...and frankly is more like real IFR. No-one expects to do an Initial Test with zero training.
I think the proposed FAA to EASA IR conversion is actually pretty good (one exam and an IRT, no mandatory training), the problem is the silly requirement for 100hrs PIC Instrument Flight Time. Which unless studying the inside of clouds is your hobby takes 500hrs of IFR...