I almost never play scholar... I knew when I was forced to put points into only one job (well, really just once for your entire class), I would put them into SMN to be the absolute best SMN I could be. I will recognize that doing the 15/15 split isn't a horrible decision, and you could do it if you enjoy playing both smn/sch equally... but I really just wanted to go 'all in' to SMN to push out the highest numbers I could on the most difficult fights. I play WHM if I ever want to be a healer, and that is my secondary job so it works out. There have been times I've played scholar and I haven't felt too much of a decrease... but if I need to heal, I put more energy into WHM gear, and my WHM has all mind.

Things will get very interesting when all classes have two+ paths... people will be 'forced' to choose regarding which points to put into everything, and if let's say a nature magic user is branched off of conjurer, perhaps some spellcasters will prefer to put CNJ points in INT and arcanist points in MND for scholar? ;P (Btw, this is all just theoretical for the sake of example. I'm not trying to start some rumors! Lol)