Seriously, vertical terrain adds so much depth to combat in literally every genre possible that any camera issues are more than made up with an increase in tactical options.
https://youtu.be/BE4mjBETKjU?t=5m21sThis. Tree on a screen means - lost focus. Game means - its not about gameplay, its about camera movement. Any change from gameplay to camera stuff could not overweight bonus of verticality. If its not possible to add verticality without loosing gameplay focus then do not add such a thing.