When you do the Blacken vision when head goes through a Mesh can you add a boolean somewhere indicating the hmd is inside a wall, Currently I’ve ditched the Teleporter code (not removed as will probably put it back in as an option),
I’m using a more direct locomotion from the Handset relative movements. One issue I have that I’m not addressing yet is I’m checking for collisions from ‘about’ knee height below the HMD in the direction of movement requested to stop walking through objects and walls but if a player sticks the hmd into a wall they can then effectively pull themselves through it.
I tried a quick test with pushing the world away from the hmd as it got close to walls but it feels just a little too weird and will probably cause VR sickness.
a simple boolean when HMD inside a wall might let me disable the ability to walk. guess it wont stop them getting the HMD all the way through a wall but mixed with screen going dark it might stop the problem.
As for the optimizations, I wasn’t complaining before, you’ve managed to solve somehow the networking of the wands, I was seriously loosing the plot trying to work out how to do that from the base Epic Template and the multiplayer shootout demo.
Love the work you’ve done so far 
with regard the VR keyboard
http://www.lamb.uk.net/VR_Keyboard_Template.uasset
might help, its just a widget with 0-9 a-z space delete and enter buttons to throw into an actor.
But I made it when trying to originally get multiplayer VR working and wanted to be able to input player names.
might save you half an hour making lots buttons.