Honestly, I expect it to be pushed back past 15 June. This is without having seen the newest patch however.

There's a lot of tweaking to be done, and one of the features people are really looking for was recently simply a GM tool (terraforming) and will need to be adjusted to better fit the uses players will want.

PVP balancing hasn't even begun yet, nor has player testing of the features that are going to be used to control the griefing level of PVP. PVP fighting itself has had some changes, but it's all very limited.