This reinforces the centrality of stability in Epicurean philosophy and provides an obvious reason why not all pleasures are to be chosen.
As a small adjustment if this were being stated formally, I would probably say "importance" rather than centrality lest someone take that as an indication that stability is the very center. Not to be picking nits but I think everytime someone uses a modifier or word other than pleasure they are opening themselves up to logical inconsistencies.
Also, I don't think we have a good handle on the modifiers even when used clearly. Stable
and "without pain" and "without disturbance" I think are adverbs, as are descriptions of intensity and duration. All apply to pleasure and don't stand alone. Plus I don't think we have a handle on how to rank even those, and it may well be that the reason we don't is that such a ranking is purely subjective.