Yes, the old Miru is nothing i would hold to but the new Miru is not something to throw away, by no means!
The problem here however seems to be that the other girls are all so damn beautiful and hot in this version, that I could simply not chose only one of them. If you ask me, the only possible ending in this reworked version would be a "harem" ending, let's call it a "polyamory" ending in this case. Could be even an "open relationship polyamory" where not only the MC but also (some of) the girls would be permitted to have sex also with other persons if they are so inclined. That, for me, would be OK and even "kinky" if consented by all parts. Because I personally can see no way to chose only ONE of these gorgeous women and give up ANY of the others. That would be such a waste..