Most of those problems sound related to early software implementations. E.g. There are ways to "switch to 3rd person views, zoom and pan the camera or detach it" in comfortable ways. The easiest is having a virtual screen (or portal) but not the only one.
Some other problems relate to game play versus screen/mouse users, which I think it's sort of missing the point.
The sweat problem would be easily resolved with a "soldering mask" solution, like PSVR. Some have modded their Vives that way. And I agree the angle could be better, as the resolution.
But hey, it's definitely a gen 1 product and GPUs just started to have features that allow improvements in hardware that don't tax GPUs so much (such as viewport multicast).