I agree. A few 'classes' for the College - for example, 'cast five apprentice-level spells on Tolfdir'. The need for a few radiant quest between Companions quests would lengthen the Companion's quest, improving its pacing and thus making the questline a very good one - at least IMO.
I personally think it should have been like Oblivion. Not the recommendations part, but going through the ranks of Novice Mage. Actually my build for the mages guild. I actually made a thread about this. I personally thought it was to obvious the High Elf was going to be the bad guy. I think they should have switched it around. The Eye of Magnus stays where they found it and they don't bring it to the college, Toldir is studying the Magnus, but he is still your teacher. As you go through the ranks you gain an emotional connection with Toldfir, and then he becomes consumed with the Eye of Magnus and becomes a beholder of its evil, while the High Elf is the one trying to stop him. Just because I felt Skyrim painted the Altmer as all bad people and they shouldn't have.
While you think the High Elf is the bad guy, and are being lead, Toldfir.
Second off I know Radiant Quest are "fun" [I find them bland] I think they should have went the old school way. So let's say you have Novice class lessons, but before you can take your Novice test you have to help out the staff with jobs from the different staff members. And these aren't glamorous jobs at first, such as collecting imp gall. Also they should have "Closed" off the Main Quest.
Such as when you learn about the Staff of Magnus, instead of making you go there, instead they send another staff member or member of the college to go, while you do some meaningless task. Yeah sure players will be pissed, but the thing is you still go off to the Staff of Magnus, but it adds the realism that they aren't going to trust an Apprentice mage as something high secret as that. Instead they make you help another teacher, chomping at the bit, fuming angry that you can help with the staff, but instead are forced somewhere else.
And I know a lot of people don't like these "closed ending" quest. But I prefer over the radiant quest were nothing feels like its being accomplished because its the same task over and over again.
Then after you do the ridiculous task that they told you to do, you take your Apprentice test to become the higher rank, find out the staff member didn't come back, go to find them, then at the same time go off and get the staff.