I agree with Gil.
It is not an "xlights" or "vixen" or "HLS" thing. It is using a 2D sequencing program in a 3D world.
Pick a "sweet spot" where it is the best viewing for your show, then have a go. Even if we had 3D in the sequencer, can you imagine the thought processes necessary to figure out what to do when you have multiple "sweet spots" to view from? Wow, what a headache that would be.