It would be nice to add that back in, as I have no idea why it's gone now.
Previously, when tracking a player, you would be able to use the mousewheel to move your view in and out but remain focused on that player. Can't do it anymore unfortunately, which is puzzling.
Also, is there any way to add an "up" and "down" control to the camera when in "free flight" spectating? Perhaps by using unassigned keys in spectator mode, like "r" and "f", or is that beyond the capabilities of the engine? Just a thought, as in order to move straight up and down now, you have to look straight up or down and then move either forwards or backwards; kinda kills immersion when you're recording a match.
Not a terribly important idea, but it could aid in making cooler movies in spectator mode to suck in more people
