Neither of the given examples were a search for alternative solutions to the problem. If you're after suggestions, that's cool - but when you're giving orders, call them orders.
The title of the article was "...Kill Company Culture", not "...Demonstrate that the Company is Dead".
If the CEO (or the intervening levels of company) are not open for discussion, the choice of email really doesn't matter. If they are, and the terse, uncommunicative, fiat email is sent out inadvertently, then that email is damaging.
