I should have said for all intents and purposes.
Yes, I play that game with enchanted weapons. My enchanting skill never goes up unless I recharge the weapon or make one. I usually trained my Enchanting up so I would use less charge per strike. Now, I when used an item, I don't remember ever getting a skill up and I used an enchanted lock opening item all the time. Even if this game follows the same formula, I doubt anyone would even see the Skill bar move from using an enchanted item. At .1 per use, that's 100 uses before you get one skill level up. Hardly worth it. You would get more leveling effect out of charging the item to use it 100 times.
Now, the trick is, trap low level creatures in Petty Gems. Then you have to use a bunch of them to charge the weapon, and your enchanting skill will go up faster each time you charge your weapon up fully as compared to using Grand Soul Gems which can fully charge things in 2 applications
True that it wasn't a typical leveling strategy, but you could get a whole heck lot of charges (i.e. "uses") that were instant cast out of a grand sould gem and 1pt light/open/lock. I used that strat a few times to get some enchant levels in a pinch.
Also, good idea on using petty gems for recharging...I typical gave up casting soul trap on smaller creatures mid-game. In skyrim with my perked conjured bow, i get tons of petty gems.
I think what makes Skyrim a bit different is the fact that fortifying destruction (for example) could net you 100% cost reduction, which applies to staves as well. Essentially infinite cast staves (of that magic school). Still not any benefit (that I can see) over normal magicka-free casting, but a fun RP style none-the-less. A backpack full of 10+ staves to do any job that needs doing.