What brought about these nebulous "tweaks" of which you speak? Were these tweaks made for the purpose of promoting a more Christological reading or did the tweaks result in a more Christological reading? The former is a damning critique of Christianity while the later is the revelation of a hidden God through finite humanity. Can we explore these tweaks with greater precision?
I don't think the answer to this can be known with any certainty. What evidence remains, after all this time, aside from the texts themselves? And, as we've discussed previously, textual criticism has (to be generous) inherent uncertainties. I suspect that it was to promote a more Christological reading. That was, in fact, the end result.