It was switched to Angel because at the time X-books were an editorial mess due to nobody knowing how to course correct after AvX. Bendis was initially going to have Young Scott and X-23 get together, but then Young Scott was taken away from him without warning for another book, so he had to change shit up at the last minute.
It's super obvious that the entire scene where X-23 and Angel get together was intended to feature Scott. Like, it happens right after X-23 and him have a moment, and seems to just come out of nowhere... unless it was originally planned as a continuation of that interaction.
Laura's one long-lasting (ish) relationship was the result of an editorial-writer mixup.