to be fair the movement system really needs to be decided mainly one way or the other. The thing about motion sickness is that its physiological. Its the same thing as seasick. However, with enough enduring and practicing. The same way sailors (who got seasick) get their sea legs, is the same way people who get motion sick in VR stop getting motion sick. For me im also part of the group (and most people i know) they dont get motion sick from VR and when we did, its was only the first 15 hours or so(over the course of a few days). Now its not a problem at all. To be fair i would recommend people try Google Earth VR, then The Lab, then Subnautica. In that order. First ones stationary and moving the world around you, second one is teleporting with being able to walk around, and third one is locomotion, but swimming which makes it a lot easier to get used to, not only that but the game includes places you can walk. So trying them in that order and not giving in to the nausea is one of the best ways to overcome motion sickness for anyone struggling.
Perhaps a little VR training mode in the game to help people adjust through those steps? But if not, you can try the viveports option where instead of instanatious teleport, its a very quick movement, i tried this earlier on and it actually is so similar to teleporting, for motionsick users it works very well, but also with this it would help with pve and pvp as the character wont just disappear instantly when someone is trying to attack them. This may make it more fair and would be a healthy medium between teleportation and the runescape method. But obviously, i really think for future VR MMO’s people are going to need to get use to VR locomotion, but as this is one of the first ones ive seen being worked and the audience for VR is pretty young i guess you can make compromises.