Its highly likely that the stress had a lot to do his sudden death. Pak performance this world cup has been dismal to say the least. Despite being an excellent coach Woolmer could do little to turnaround Pakistan’s politics-ridden cricket. I wouldn’t have been surprised if Woolmer had a book in the works (considering the number of cricket books these days) covering his experiences of coaching Pak and dealing with its internal politics.
Woolmer still clearly had a lot to offer the cricketing world and it was sad and unfortunate that this happened.