Yeah I think those two would occasionally win a big tournament. That's about it though.
And that's not what ATP/ITF wants.
But anyway, I think slow HCs should be banned, they destroy players' bodies. HCs should be at least medium-paced, that would shorten rallies, thus be less damaging for body. Anyway, I once calculated the ratios of different surfaces on the tour:
So, if we lived in an ideal world where clay would be slow, HC medium-paced, and indoors and grass fast, we'd have about 1/3 on clay, hc, and grass+indoors. But if we weighed those tournaments by points available (GS=8 250s), the ratios would be as follows:
So, HCs are dominating in the higher tournament levels. So if I could affect on surfaces, I'd reduce no. of outdoor HC events so that 1/3 of points available would come from slow clay, medium-paced outdoor HCs, and fast grass+indoor HC/carpet. That would be fair for all styles of play, and possibly bring more variety to tennis.