Even more annoying is you cant make your own spells and theres no way to combine multiple spells into one with your choice of power or duration.
I previously made spells with a full set of daedric armor to keep my mage comfortable while fighting and unencumbered while travelling. Also combined helpful effects for myself and allies, and combined weakness to fire with fire magic.
All that stuff is gone. So it summoning any creature in the game you want (Oblivions construction set allowed it).
Also, since I cant hard myself without falling, its difficult to bump my restoration skill. In Morrowind I made a spell that let me do fire damage and healing, on myself. In Oblivion I made an area effect spell to do the same thing and just cast it on a tree or rock. Improved both skills at the same time. Good stuff.
None of that any more. Now I gotta jump off cliffs, hope I dont die, and heal myself. Run back up (which usually takes a while) and do it all over again. I have an Expert heal spell but I dont get skill points from it unless I'm really hurting, which means long falls, which means lots of quick saving and loading if I dont measure them correctly.