1) PPCoin developers are really awful at English Communication.
2) PPCoin developers are really awful at PR.
3) PPCoin developers are jealous and afraid of being copied/outdone. (open source, but not open interpretation of source)
4) PPCoin developers know something bad and they are hiding it strategically.
x) They know that design is half-assed, but it sort of works for now so they just don't care, hoping that in future problem will be solved.
Sunny King has no problems with communications and PR, he simply does not give a fuck.