You can easily make an Excellent stat spread without 90 in a few stats. Being Excellent won't make this a jack of all trades, unless we decide to do so. What it will let us do is, should we desire, take a Very Good stat spread and augment certain areas to help cover CAP9s big weaknesses, a reason I was against Ground to begin with. If we don't have defensively strong typing (CAP9 is mediocre), we will need good defensive stats or we risk compromising the competitive value of the Pokemon. If the community doesn't want super stats, they can still tone down the overall spread of an Excellent Pokemon to be that of a Very Good (420 = Excellent, 419 = Very Good).
If we're going to have a 400+ Pokemon who is Very Good, we might as well open up the possibilities by going Excellent. Bad defensive typing and decent bulk might not even be enough. For example, Cyclohm is a 418 Pokemon, moderate bias to defense but the Ground + Ice weaknesses greatly compromise this defensive spread. I don't want defensive typing to compromise a Pokemon again, even if CAP9 is far from a tank. If we "overboard" to compensate, then so be it. I think most here would rather have an overpowered CAP than a cool but impractical CAP.