User blog comment:IamJakuhoRaikoben/Chapter 383: Surfer Lucy, Review./@comment-24748439-20140510013721/@comment-24264679-20140511021844

Leo only can out one using his own power when he was Gray's partner and even then he couldn't use his Celestial powers while the contract between him and Lucy was canceled.

I doubt Kyouka is still bound by the vines as Marde already taught her a lesson. I understand Minerva wanting her revenge on Erza but she also wanted to raise her status. She stated it during the Sun village arc. She wanted to get revenge against Erza and increase her status at the moment she will focus on what she can have and not what she can't. Minerva isn't stupid to go a demand that Erza be brought back just yet. Also knowing Minerva she will think like if she does this thing she could ask the king to release Erza and continue to fight instead of getting the status.

Also Lucy going to the Celestial spirit world could only mean bad things for the Earthland. If Lucy was to go to the spirit world they would take her to heal her injuries and rest which would take about a day in the celestial spirit world which would be the same as 3 months in the Human world. Given 3 months most of Earthland would be destroyed, E.N.D released and magic disappearing from this world. Also at the moment only person who knows to release Lumien Histiore is Lucy which is suppose to be the thing to stop E.N.D.