On officials, PVP/PVE-C makes up just under half of their total playerbase. The reason why PVE is a little more than half is because Conan Exiles attracts quite a bit of non-PVPers for the building aspect. Let’s be honest, CE has a great building system, rivaled only by Vaheim (which only has one type of stone and wood available).
You cannot compared game types to see if one is falling behind. If the game is growing by 10% in a timeframe, and they all go to the servers in equal measure, then all types grow by that 10%. Just because a PVE player starts playing CE, doesn’t mean that a PVP player leaves for the same reason the PVE player started playing. The only way you can tell if a certain game type is dying is to compare their numbers on a day to day basis over a period of a month or so and note any trends.
I could do this, but to be honest, I don’t really have any incentive to. But if any of you want to. Pick a time (I recommend peak time for CE, which I believe is in around 2-3 hours from writing this), login every day at that time, filter by official, filter by game type. Then sort by population and start counting (it doesn’t take terribly long, around 5 minutes). Do that for a month and then pick a program to load those numbers into and plot the trend. Then you’ll have your answer.
I can say this about unofficial PVP servers. They have grown or maintained. Every wipe cycle they have been through in the last few months has seen growth in the form of their queues. That’s right, a few 70/70 and 80/80 servers still see queues. This is a bit anecdotal though. But if PVP was dying on those servers, they shouldn’t be seeing queue. So that evidence shows they are not dying, if not showing how much they are actually growing, or maintaining. But when you’ve got playerbases that large for singular servers, growth isn’t as important as maintaining anyway.