As someone who's played more than a few ragers, I'd say that the drawback of no recall, while tough, is appropriate given their powers.

The lower player numbers have given ragers a boost considering that there are more one-on-one battles and fewer enemies to follow-up after you kill the first (or to attack you when you retreat to the village).

If anything needs a boost in CF, it is without question thieves. They were not strong before Devious Versatility was nerfed and now they are even worse. They can be strong in the right cabal at mid-levels, but at hero are way to niche.

Considering they are one of the archetypal characters, there are very few around and there's a reason.