Summoner seems fine to me. Scholar feels like it's mechanically/conceptually on the right path, but they HEAVILY undertuned the numbers or tacked on unnecessary gates and negatives. It feels sort of like release-Astrologian. They had a goal in mind, overnerfed things to achieve that goal, and then left all of the new stuff too weak or restricted. For example, does the Fairy really need to be unable to move while executing Fey Union? Chain Stratagem lasts 15s and has a 2 minute CD, and thus might as well not even exist considering it's essentially just a crit chance increase. Excogitation is barely stronger than Lustrate, has the same Aetherflow cost, and will often do absolutely nothing because tanks don't often drop below 50% in duo-Healer situations. All of these issues can be fixed, but the ideas behind SCH's kit seem acceptable.

Or perhaps I'm just disillusioned by comparing it to WHM, which has a TERRIBLE concept and mechanic. (Note- WHM is actually better off than SCH and can perform better in content, but their new mechanics are simply trash and boring)