At release, and for some time after, the following were true of leves:

1. Leves were the best way to gain XP and level up.
2. The number of leves able to be done in one session was highly limited.

Back then, losing a leve to DC was a big deal. With the changes since then, this is now true of leves:

1. Leves are only one of a number of viable ways to effectively gain XP and level up.
2. You can build up 99 leve allowances and do as many or as few as you wish in one sitting.

As you can see, or will eventually find out, losing a leve to DC every now and then has now become no more than a minor nuisance. A bigger nuisance, imo, is having to go back to town after every 8 leves to pick up a new set. Suffice it to say, I doubt making changes to this is very high on the priority list.