Yeah, I actually have plans for alternative class features for the anchorite and the savant, I just got bogged down in terms of actually writing them. I haven't figured out any feat ideas yet, sadly. Rest assured, however, that I am definitely intending more support for the two Codex II base classes.
I'll note, though, that I tend to shy away from base-class-specific prestige classes. There are some that follow thematically, but I try to avoid anything that prevents, say, a spellsage from becoming an elemental channeler. Ardent soulshaper can be entered from pretty much any base class, with moderate feat investment. While anchorites can certainly enter into it easily--and have good thematic tie-ins--I wouldn't necessarily consider it an "anchorite" prestige class. After all, the only time I've played one, I was an elemental adept.