I hope it is through tomes or you can still get some weaker spells by buying them (Or as I call it, paying them to teach you how to cast it)
Completely agree, without the spell maker I mages will feel more like playing an Orc with a warhammer, me big strong Orc hitting enemy, me doing power strike crunching skulls, me switches to batleaxe fighting dragon so I do bleeding damage. I'm a Altmer I throw fireballs on enemies, I use both hands then fighting tough enemies and frost cone then fighting fire elementals because they have weakness to frost.
Worse case mages are unplayable, however it's not gamebreaking as pure mages was unplayable in Morrowind and it was not a bad game.
And 85 spells, how can anybody get that to work, then thinking of the different spells. It would require that they cut 3/4 or more of the spells in Oblivion. Yes spells now have more uses, but how do you use heal on both yourself and other? Yes you can automatically level scale spells, so your fireball does more damage at higher destruction skill but the area of effect will be fixed. You want a larger area effect, hope you find it among the 85 spells.
Wonder how many monsters you can summon? I guess 10.