Setting renderFullVBO causes us to do more expensive operations. And so ideally, we will can reduce those calls. I thought I'd implemented support for a "staged for deletion" voxel, to "hide itself" in the VBOs using the shouldRender behavior... But the only thing that wasn't working was the "server resending race condition" I describe in the Basecamp to do... so If you're not actually getting better behavior with the renderFullVBO, then please remove that.