Here is an announcement from a moderator at the EU Playstation forums informing gamers that they have increased the amount of Warhawk servers and there could be even more ranked servers to come.
Here is the quote in full:
"The successful launch of Warhawk on 30th August has resulted in a huge demand for games hosted on SCEE servers. In response to this and to get ready for this weekend's play, we have substantially increased the number of European ranked servers available to you. This will allow you to join ranked multiplayer games more easily. We will continue to monitor the number of servers required on a regular basis, and will be further increasing the number of SCEE servers over the coming weeks."