an enabler for speeding evolution

While the idea of evolving the ability to evolve faster might be made to work, it needs to be spelled out carefully, lest it attribute foresight to evolution.

Ordinarily you have trait X and you say it increases fitness and goes to fixation in a population, but it's less obvious how this works with the trait of evolving faster... which is not to say that such a thing is impossible. But you might need to invoke differing long-term survival of large groups of species, or something...