Time limits already exist in many missions in the fifth game. And I don't think I'm the only one who finds them annoying. It's better to have a limit on unit growth. But the limit should be quite high! And neutral creatures should also stop growing once they reach that limit.
That's exactly the point – it's not Nival developing the game anymore, but Black Hole, and you can expect anything from them.
Демократия есть одурачивание народа при помощи народа ради блага народа.(Уайльд Оскар)