I agree there isn't a lot of variation of spells BUT, I realise it's not worth the developers time implementing 30 spells for each school because the simple fact is people will and do only use the best spells so all these extra spells that could be in the game would never get used anyway. The developers have given mages spells for every situation and no more is needed than that. Stop calling it 'dumbing down' because it isn't. I don't understand why people have to moan about everything in this game :/
The problem is that they haven't "...given mages spells for every situation...". True, I think the atronachs they do have are plenty powerful for their level, but flame atronachs are glass cannons and die pretty easily in melee against pretty much anything (so no spell for
that situation like maybe a scamp, as a melee/tank, could be used). The frost atronach is a good tank, but no ranged that I've witnessed (so no spell for that situation either so another daedra summons could fill that spot). I've had my frosty get stuck in a cave and not do anything even with the enemy just a few feet away, but out of range of melee, and had to recast as he had/used no range attack. So there are spells that mages could use in certain situations that the current spells do not fit.
Yeah, magic is far less interesting in Skyrim. I don't play mages in RPGs, but I love to play necromancers and that's pretty much impossible now. D=
http://www.youtube.com/watch?v=xHrlXE2PhBE Damn, Nell2Thalzzay beat me to it.

Shadow spells would be like bolts of darkness or other spells that would be dealing with pure evil. The current spells just don't seem evil enough to call myself a necromancer. The raise dead spells are a step in the right direction though.
Although I could see those being used as a necromancer they do not fit in the conjuration school, imo. An Absorb Health spell would be cool or those shadow spells, but they would be better in Destruction school. (Don't know if "shadow spells" fits the TES world though).