I have watched a ronof video since VRs inception in 2015/16. I have moonlighted as a VR videoeditor and made PMVs/Compilations. Through all of that I have indirectly and at times directly took note of what are the major contitutients that make a great scene:

In focus and high resolution shot scene with a high quality camera rig.
A high quality set up and scene setting. Immersive environment and background.
Good theme based acting that draws the viewer totally in on the intended theme.
Premedidated and calculated distances for the camera on each sex position to maximize being able to see key body parts in focus during the action while not being too close or faraway.
A proper level of seduction and/or foreplay (i.e strip tease, dirty talk, girls kissing , playing with each other etc)
A good mix of cock tease or cock worship (kissing the head, tongue bathing the frenulum and/or balls or in threesomes two girls dancing their tongues on opposite sides of the shaft) and then deepthroat.
Enough gyrating and grinding in cowgirl or reverse cowgirl not just straight up and down robotic fucking. In VR you acrually feel immersed more wh3n the girl gyrates her hips a bit more sensually going up and down on your cock.
Whispering in the ear throughout different positions especially in 3 somes.
Enough eye contact in each position.
A soles up and enough feet worship portion in the more zoomed out missionary position part of scene. Also a very good view and measured distance from the camera for a clear view of the pussy lips during penetration. This when done right is a smorgasboard of sensory and dopamine release for the viewer.
And some of the most immersive of all points.... at least 2 solid minutes (and in 3-somes, 2 solid minutes with each girl) of lean in laying Cowgirl with centered eye contact on the viewer while the girls says some variation of : I want to stare deep into your eyes when I fuck you. Melanie Marie has mastered this in almost every PT and non PT SLR scene she has done. Stratton in a neural link also nailed this BOTH in laying and seated CG. Laying #1, then semi laying or seated are by far the most common positions while watching VR and therefore should be catered to the most since even non PT encoded scenes now can be watched as AI PT.
I think in recent months SLR has really stepped up their game . Many of these latest videos nail most of these critrical items. One of the other main area the subbers have been asking for is more 3 somes and 4 or more and SLR has been delivering. Even a 3-some PT with Melanie which was glorious!

Thoughts, and let me know if there are any I have missed!!!