Right now the max strength you can get from carrying heavy things is the same across all races, and it takes about the same time to hit it if your potential is there. But that doesn't feel right. If I have a potential strength of 40 it should be much easier for me to go from 16->17 strength than someone with a potential of 17 or 18. Corpses also tend to stop giving benefits long before you hit that potential.

I'm playing a Mist Elf wizard right now and the fact that some of my learning/mana potentials are ridiculously high just don't seem to matter that much, because I'm not going to hit them, and training in DT is expensive at those levels.

It would be nice if super-high potentials meant something.

So, I suggest:
1) # of "training points" or whatever needed to get a stat boost is lower the farther you are from your potential. This should affect Garth to help reduce costs. Athletics could help more, etc.
2) Soft/Hard limits like normal stat boosting corpses (i.e. ogres) should be higher if you have higher potentials.

At a guess, I'd expect that the current difficulty of training should be what you'd expect when you're 3-4 points from say, a 20 potential under the proposed new system.