Late reply, but I felt there were some points needing addressing in this post.
The lack of there being any flying creatures in Oblivion, to me, felt like a big mistake.
As for the Cliffracers themselves, in Morrowind, I liked them, except when the freshly killed corpse of one fell through the landscape before I was able to harvest it.
-You misunderstand. I did not say cliffracers needed to go, I said
hostile creatures that exist for the sole purpose of annoying you need to go. I got sick and tired of being attacked by cliffracers every five minutes in Morrowind, but I did not mod them out of the game, I added a mod that made them passive. Problem solved, and I can still hunt for racer plumes whenever I want.
OK, something seems wrong here, first you say leave Enchantment out, then you say you want to be able to Enchant stuff in a certain way.
-Yes, I forgot to elaborate on that one. Enchantment can stay gone because it is a completely redundant and unnecessary skill. To make up for this:
Enchantments will now be tied to your magical skills. For example, if you want to put a Frost Shield on your armor, the higher your alteration skill, the higher the magnitude and duration you can provide the enchantment for. Enchanting will not "fail" like in Morrowind, but will instead be capped based on your skill (not to knock Morrowind, but pass-fail systems are a very arbitrary means of adding challenge to a game, nowadays). For multi-school enchantments, the mean value of the different schools will determine your capabilities at performing such an enchantment.
Using enchantments will contribute nothing to your skills. They exist to make magic available to those who might not be capable of such feats on their own (at least, that was the idea in Morrowind). No skill involved using an enchantment. Creating an enchantment yourself will grant experience for each magic skill present in the enchantment (ex: adding a fire damage and paralyze effect to a longsword will grant experience in Destruction and Illusion).
In short, I want Enchantment to be skill-based once again, but I don't think it's necessary for it to have its own skill.Simply tying enchantment into the other magic skills would fix that and also fix the most glaring flaw in Morrowind's enchant system at the same time.