No, Scholar heals are perfectly fine. What needs a buff is Leeches, because right now that's just a pointless knock off of Esuna, something which could easily have been given to Scholar in the same manner as Cleric Stance.

Either, like I said, remove it and give Scholar Esuna and something more useful (Sacred Prism for Stoneskin, but I'd rather that be a cross class skill again, not that it matters with Bard being screwed over), or following a similar style to how Succor is just Medica with a Scholar unique effect, give Leeches something to make it stand out. It's called Leeches, have it leech status effects off your party member giving us a special status effect related to the removed status effect. Have that grant an additional affect to Succor and/or Sacred Soil; Succor removes that status effect from all party members within range, Sacred Soil grants an additional resistance to that status effect for party members within its range.