I fill them in when I see them.
I rather like the current portals, just walk through and BAM! you are in another world. I suppose I wouldn’t mind if some particle effects were added or something, but nothing that impacts the immediacy of the transition.
100% opposed to any pay-to-win initiatives.
As an explorer, the more places/caves/etc to travel/spelunk/etc into, the better.
+1 for grappling hooks and tameable mounts