Board Thread:Questions and Answers/@comment-30381369-20160718021536/@comment-16461120-20160718132600

1. Goblin Queen is more of a title than a shift in powers; however, she was driven into madness by the revelation that she's just Mr. Sinister's clone to be used against Jean Grey, and then exhibited various dark sorcery and psionics, possibly related to being demonic, though it's also possible she could have done those things without being the Goblin Queen since she was previously learning magic from Selene.

2. I had overlooked that, but it appears to be the term used to describe the demon summoning you mentioned, which I believe is unrelated to the Goblin Force powers seen in Earth-1298.