I don't even come close to knowing all the medical details of this, but asthma (and its associated illnesses) is a really, really widespread, common condition. Discouraging athletes with asthma from taking part in competition (by disallowing asthma meds) seems draconian. I mean, two of the Olympic champions from Sochi (Charlie White, Yuzuru Hanyu) have asthma. So I'd be very hesitant about taking that kind of step.
I think in many cases, asthma meds are used simply to bring people with serious allergies/asthma up to the level that non-asthmatic people are at, or close to it. I know that's the case for me personally--even with allergy meds, my breathing is still not as good as most "normal" people's. I doubt there's anything I could take that would actually make it better than normal.
But I would assume this matter is looked at carefully by those in charge.