There are possibilities:
1- People will be afraid of non-ranked and go pvp.
2- People will use both arenas, but the pvp non ranked will be a test player vs player.
3- Putting unranked as first option will not help develop the pvp system.
1- The Ranked PvP is good at is it, however there could be an additional option: The server could allow a 1vs1 pvp special arena (King of the Hill rules).
Explanation: The winner remains on the pvp map, and people wait for the match to end. (A regular chat)
2- Set the direct warp to the pvp-yoyo mode instead of naming as the primary pvp option.
About the Titles:
The idea is to motivate players to pvp, so... how about the Staff set a list of possible titles...
If we players set it... there will always be somone in the staff not liking it. (Set a Poll)