Haha, thank you! It's fun to have those kiddos show up and we're glad you had a good time with it, too.
Unfortunately, it wouldn't be possible for us to add more chances to change your relationship. It'd add extra programming complications and, unless we went to even more effort and added alterations to smooth things out, the change in dynamic would come across as really abrupt. We have to limit it to once per Step. But the Steps don't take place over a very long period of time, it's kind of understandable that there's not enough time for their relationship to notably change from what it starts out as.
We're not sure how much content the MC doll will end up having by the time the game and all the DLCs are fully finished. We'll see how it develops!