in AVA for sure when a enemy pilot bails in a effort to be on ground to kill troops I am not seeing a red icon, just a little speck running across the tarmac. Should the icon be seen in this case?
Once on ground, bailed enemy pilots never have any icon. That's just the way it is, no bug (Just like enemy vehicles do not have an icon either). No bug.
Also in AVA is it correct for a fighter to be able to take off from a destroyed vehicle hanger on a vehicle base.
You should inquire about AvA settings on AvA forum first. What exactly is enabled by arena settings or by map default is within the responsibility of AvA staff / map designers.
And as long as not all hangars of a kind are not down at the same time, you can still roll GV's / planes from their respective spawn hangars of course.