I really miss the unlock spell as well.

in my opinion gives the "thief" character some more depth, if you wanna easy lockpicks you gotta be a thief, not a mage
Honestly the lock picking mini game is just laughably easy imho. The only locks that ever give me trouble, even when not playing a thief character and having no lock picking skill at all, have been "master" locks. So if extra depth for thieves was the intent it plainly fails at that imho.
Personally I just don't bother with the lock picking mini game anymore unless I play a thief-like character. When I play something else like a mage or a warrior or whatever, I just console
unlock and then imagine my character used an unlock spell or bashed the door in.