And I should mention tough ***ING cookies that you under your own power "ruined" your experience by making an OP spell, Im sorry for your Loss and detreiment in experience, thank you for ruining mine.
You are completely missing the point.
Giving the players the power to create spells much better than the ones the developers add to the game can completely ruin the experience for people.
If you give players an exuberant amount of freedom in spellmaking, there is nothing there to stop them from abusing the system.
What's the point of buying the Fire spell that one mage sells for 2000 gold when you can create a much more overpowered version of the same spell for half the price? (the spell cost me what, 900coins to make)? and it's much better than some spells i can buy for 2000+.
And let's not forget about the famous 100% chameleon enchantments that are possible to be made.
I was much happier on my first Oblivion character when I didn't know about enchanting than I was after I realized i could abuse it to hell.
Yes it was my own fault for ruining my own experience, but you can't blame anyone for doing something out of curiosity. Hopefully Bethesda this time limits enchanting to prevent people from breaking their own experience.