It is quite literally one of my favorite things in VR (and IRL). It adds a ton of intimacy, it brings the women close to the camera. The nipple is an important erogenous zone and when there are 2 women (or more) then it gives something specific for them to do, and makes them be more interactive with the POV.
Not only does it add intimacy, but it leads very well into ASMR, allowing the women to move in close to kiss the face and whisper into our ears. When there is more than one woman, then it creates a sandwich effect, like we are in the middle of heaven. It creates a space where I feel the women are with me, and on top of me, instead of just in front of me (something that many other studios have not learned yet).
Male nipple licking is a staple in JAV scenes, and is popular among other studios as well. All the top studios do it (VRBangers, CzechVR, etc). It would be a shame if it's taken away, based on a forum poll. Just because it may not win the majority, doesn't mean it is not appreciated. There is a reason why SLROriginals have become as famous as they are, and one thing that it does so well is that it makes the viewer feel like the center of attention. It gives every woman performer a directive. If they don't do something specific, they will end up in the background, just staring and moaning without any real conviction. Give them something to lick, kiss, carress, tease, etc. Not just the nipples, but every erogenous and sensitive spot that can be pleased. This is the way!