Majestic Prince surprised me. It started off pretty stuff, but it got a lot better by the end. I disagree slightly on character development, the team starts out completely dysfunctional but they're a lot more tight-knit by the end. True enough though, the writing of the show was at its worse during the enemy segments. On the Federation side, a few characters definitely could have gotten more. Commander Simon, especially  in the last episode, seems to have a lot more going on. The producers WANT a second season, but that's only discussion and nothing's set in stone.
The World God Only Knows might very well get a season 4, but the current manga arc (which is a direct followup from the Goddesses Arc) is still ongoing. I had a bunch of problems with this season, but they were mostly because of the recaps and skipped arcs. They handled the final parts of the arc very well, and those were definitely the highlight of the arc.