My reasoning isnāt quite the same as yours, but I use a few Artha hacks too.
Personally I find Deeds points to be kind of underwhelming, considering how rare they are and in contrast to Call-Ons which can function like a free āvirtual deeds pointā every session. (I.e. call-ons work like saving grace, but for a specific ability, and it doesnāt contribute towards a long-term epiphany, once per session).
My hacks are as follows:
Saving Grace no longer acts as a mere call-on does. Instead, it simply will makes the test succeedābut you wonāt get to mark advancement, and thereās no marginal successes. Basically, itās for those āI donāt care about marking the test, I just wish I had passed thatā. The Deeds point still contributes towards an epiphany.
Epiphanies for Skills only require 2 Deeds points to permanently shade-shift, not 3 like stats and attributesāyou still need 10 persona and 20 fate though. This rule actually harkens all the way back to Burning Wheel Classic. Iām not really sure why they changed it the revisions.
Iām also debating adding an artha power that lets you add +1-3 Ob to static tests by spending Persona, like for social test at Ob = Will, where you canāt actually actively resist like you would in a vs. test.
Iāve also started emphasising the use of focus in my games. Did you know thereās an Artha power called Focus? I sure didnāt for the first two years I ran this game! Iām 99% sure that itās there so that you can get an advantage die, and have it contribute to the test difficulty, to get more routine tests if you need them. It lets you work Carefully (+1D) and then you can spend a Persona if you fail the test, to nullify the additional failure consequence imposed by working carefully. Basically itās a really circuitous way to get a normal advantage die out of a Persona point instead of the usual artha die (which doesnāt contribute towards the difficulty).
To address the issue you raised a bit more directly though (and I do this too), is that, if you want to see more epiphanies just hand out more Deeds. If you want a higher powered game, lower the bar for getting a deeds a little bit. I think my games see a deeds point given out at least once every 20 sessions, but usually more often than that.
I handed out a deeds just this week actually, for one of my players who saved a village from a corrupted werewolf sorceress. Just some random forgettable village, but he risked life and limb to save them, so I gave out a deeds.
Edit: And yes the other thing you can do is just shade-shift an ability during a trait vote, or perhaps by going on a special quest. Though Iāve not actually done this in any of my games before.