I feel everyone's pain in this situation but I find the new Lulu, as good an actress as she is, unsympathetic and unbelievable. I don't feel the connection between her and Dante, nor with Maxi. The only one she really bonded with was Milo and that's probably because in reality she's a new character and has no connection to those old relationships. On the other hand the new dead kate/connie totally became the new kate/connie and I miss her.
That being said, Maxi is the biological mother, even if Lulu would be better.
Seems like a no brainer to me.