Since Oxygen v1.8.0, you can now have permission based warps. Instead of all players who have access to the warp command having access to all warps, you can configure Oxygen to require specific permission nodes.
This node is:
oxygen.warps.<warp_name>
If you just wanted everyone to access every warp, you could use a wildcard:
oxygen.warps.*
Note that players still require the permission
oxygen.warp.self
To access /warp or /warps. We've removed the "list warps" permission node, and now if a player does /warp, the list is displayed instead of complaining about not including a name.
The warp display has been improved, if you don't have access to a warp, it's got a line through it. Clicking a warp name will teleport you to it.