In my opinion Anakin must be 22 by ROTS’ end in order for his canonical death age of 45 to work.
Well yeah, that’s not an opinion. But someone changing his age in RotS is probably also okay with changing their canonical death age, especially when they say it makes it more consistent with the OT.
Note I don’t disagree that his age does change if you expand the run-time of the Clone Wars, just providing my thoughts. I guess it also is a bit of my own head canon though that whenever Anakin becomes Vader, no matter what universe, he is always 22, and unless he survives ROTJ he either is in his mid-late forties.