Maybe this is a stupid question, but aside from VR is there a point to switching to WQHD+?
Why would you not is the bigger question ?
Because viewing text or any content at native resolution in this case WQHD+ will always be sharper.
Take your laptop or desktop monitor and turn the resolution down, the resulting image will be softer and blurrier. The same applies to viewing FHD as default on a WQHD display.
A display always looks at it's best running at it's native resolution.
For pretty much everything you would be better running at WQHD and just drop down if you want more gaming performance and switch back afterwards.
Samsung wisely used to reserve the resolution adjustment to it's 'game centre' application, where it was actually of use and an appropriate place. The decision to move it to settings led to a lot of missunderstanding from users about it's effectiveness and the option on the S8 to make it the default setting is very odd IMO and only leads to further confusion and misunderstood benefits which are as I have said mostly negligible outside of gaming,and even then it's questionable benefit wise as instead of battery efficiency, it may just improve game framerate rather than battery life.