Agreed. I've often called for DMs to simply become SLAs that work like any other SLA, rather than on charges. I'd keep the Racial tree though, and have it unlock successive SLAs...but then have the feat simply grant like +100 Spell Points so that non-caster classes can still use the SLAs, and the tree could add more SP in lieu of more "uses".
You'd have the cooldown to adjust to keep them balanced...but I'd be fine with, say, a halfling with Heal SLA on a 24 sec CD and CSW on 12 sec and CLW on 6 sec. Since it does scale off Char Level instead of Class Level, that's inherently better (and of course free metas, if you can take metas), but it still provides adequate self-healing for non-healing classes, for the cost of 1 feat and 12 AP.
It'd immediately create rolespace for some of the most currently underserved races...Halfling (self healing), Half-elf (Electric SLAs), Dwarf (I'd actually
reduce the CD on Radiant Forcefield to make it more useful for tanky builds). Elf isnt currently terribly underserved, but Displacement SLA would be a proportional boost and something that's already available in Warlock and Cleric. Horc and Human and Gnome dont need the help, and their SLAs wouldnt be terribly useful anyway

Oh boy a Recon SLA - a Human only needs that if they're Construct Essence, in which case they're Arti and already have it in RMM
