Topic: AA could work
I've had some concerns about planes being too easy to target if they don't have flares, at which point they become impossible to lock on to:
IE -- you have a plane with a thermal of 4 moving 13+ hexes = 1 or less "lock on" base value .....against an enemy with advanced sensors and a gunner (+3)= lock on with 4 or less ....until the flare (-5) drops you to -1. Even with a heat seeker you can only boost that lock on target number to a 0. Which means the plane is immune from harm.
So there's a strong risk of cheese designs if you allow planes with flares.
Now, on the other hand...
Same plane with thermal of 4 and 13+ hex speed = 1 or less needed to lock on. Targeted by the same platform (+3) brings that back up to a 4 or less to lock on, unless the plane has basic ECM (-1), which drops it back down to lock on with a 3 or less.
That seems OK to me, as the plane's main defensive measure is still its speed. It should be able to angle itself outside of most enemy vehicles' arcs of fire. And even if it does fall within an enemy ground vehicle's line of sight, you're looking at a 30% chance to hit, and then, assuming D8 is the default DAM value, you only have a 62.5% chance of causing a penetrating hit to an ARMOR 3 plane if you DO lock on. So at medium range for a D8 weapon, we're talking about a 18.7% chance of inflicting a damaging hit, right? Do those odds feel OK? My main concern is that the rules as they stand now don't disallow ANY weapon from firing at aircraft.