45-55+ degrees is good for HIT but aside from the other comments, having bouldering holds on the wall would be useful for warming up - just doing cardio before HIT won't cut it. Also, frankly, HIT is quite boring (like hangboarding) so there's the variety thing too.
I wouldn't be *too* concerned with the angle being steep, there's plenty of juggy holds around and it has the advantage of eventually being able to set very hard problems. |