... I'm just unsure of how to set victory points here: since for downing a UFO you get only a portion of what you'd get for destroying it in air combat, what would you gain for bombing it out - the full value?
I'd say, not the full value, because the aliens have had some time on the ground to continue whatever nefarious schemes they have had in whatever capacity they had remaining.
Maybe another portion of the total?
...say if you get 50% for shooting down...
you get another 25% for bombing,
so 75% over all for downed and bombed UFOs.
I don't know if this would provide incentive enough to make a Bomber an integral part of the game. Right now, it would be just another "thing" to add and have to do, with probably not much pay back.
Now if you could use it to develop your bomber tech to target alien colonies.... that could be cool. The alien bases could be presumed to have defenses like X-Com bases can, and then the Bomber could fire strikes into it. It would be nice if this could reduce the base population on a scale with the amount of damage applied (not to exceed a certain level, say 30-50%, but this sounds involved enough that it probably requires a custom executable.