Well SMN was disappointing in 3.0 and made many people drop the job to include myself. Though it wasn't the only job that 3.0 left a bad taste in players mouth. Egi glamour was SE's consolation prize for not adding new summons to FFXIV's pet job. There was also demand to let players summon carbuncle again because many felt it was a better designed pet over the Egi.
As for SCH, I wouldn't mind the pet glamour system being extended to the job and there are many iconic healer summons they could use.