I am not arguing that Western heterodox should not be allowed to use a Western Rite after conversion, at least temporarily, until they learn a Byzantine or Slavic Rite.
I think this road has been travelled before, Jason, and has not led to a happy place. I'm thinking of the situation in France, where a properly functioning Western Rite church became a fragmented and unfortunate shadow of its former self due in no small part to its parent churches playing bait & switch, and not leaving well enough alone. In addition, (and I concede that this is speculation but it seems that the two are linked), had l'ECOF been given the support that is proper from a mother church and thus been allowed to continue and grow in Orthodox stability, it is possible that the more recent irregularities may not have occurred.
I think that we should be sorrowful for our past treatment of the French church and learn not to repeat the same mistakes in the future. If we are willing to permit the Western Rite and acknowledge its Orthodoxy, then we should do so, and if not, then we should make that clear, but to lure people in with talk of the Orthodoxy of the Western Rite, allowing them to use it as Orthodox, and then to later say to them, 'Well, yes, it's sort of
Orthodox, but you really should be doing this instead' just sows seeds of mistrust and is a recipe for schism. We have learnt this the hard way.