One day AQ fighters are U.S. drone targets, the next they're

[The Straight Story]

4. Depends on the targets hit

Radars/anti-aircraft defenses/etc won't impact assad's ability to fight the various factions since those assets are not being used in that fight.

And if nothing else this would open up Syrian airspace for easier air strikes against al-qaida members there from the US should they so choose to do so (like in Yemen and Pakistan, not at war with either but we just struck in Pakistan again today).

If the US has a broader plan (who knows) remove assad's air defenses, strike the rebels, remove assad, stabilize the country with a government we desire and that will allow us to continue air strikes on the rebels and their leaders (not saying I am for that plan but can see it being part of a larger ideal given our past).