I hate to steal SilentResident's thunder by not waiting for an official announcement, but want to make sure folk know that one of the game's most popular city enhancement mods, http://www.tesnexus.com/downloads/file.php?id=19589 has been updated from v2.61 to v2.8.0. The Nexus description states that the Arcane University has been "drastically" altered to be less laggy. Its esp now comes pre-cleaned via TES4edit. Additionally, it is now compatible with at least one additional mod whose name eludes me. (It has long been compatible with the vast majority of other mods affecting IC.)
I have already downloaded and installed the update, but my avatar is doing Bartholm/Slart quests at the moment so unable to check out its changes.
Those who have not yet taken the plunge and remade the Imperial City in some other manner might want to give it a look-see.
-Decrepit-