Hello there,
An estimate date is not a fixed deadline is just used to provide the users with an intended timeline to release. Kal wanted to give the people that was taking Q1 as end of March an estimate of his intended release time. If it takes longer, is usually due to adding more to the version than indented or because some game breaking bug appeared and is not being solved with ease. Failing to meet an estimated date is not a fail to reach standards, for the contrary, is to meet them. There is no accountability to be taken over an estimate release date/window.
In regards to the comment above, I have advised already in another post, refrain from aggression.