In the end, this seems like a disadvantage for those who have put quite a bit of effort into making huge lineages out of their alt sweetlings. I don't see why they had to be retired. It's not like they were tradeable anyways. You can't please everybody, but I don't see how this could please anyone at all. These lineages can only be expanded once every year, and therefore I'm sure there is going to be a lot of people out there who are not very happy with this decision..
Nonetheless, I'm excited for the Valentine's Day event.