Infantry sight range +1 -- it seems that they have lower sight range than vehicles for some reason. See http://i.imgur.com/Z6nWG.jpg for infantry and vehicle, both with RevealsShroud: 5, but vehicle sees further. So, effectively 5 for infantry becomes 4, which seems reasonable.
Reduced probability of SpawnViceroid from 10% to 2%. 2% will still happen often enough if Chem Warriors are used predominantly, but with 10%, units were constantly turning to Viceroids, which was a pain. You could also send 10 infantry to opponent's tib field in early game and spawn a viceroid and kill their harvester or harass them.
Turned off units auto-targeting regular buildings, because often will attack silo over an obelisk or enemy unit. Auto-target should remain on for defensive towers/turrets, though.
As usual I'm trying to be conservative and only apply what I feel is suitable / minimally necessary.
Weapons:
Biggest change: Increased artillery range from 6 to 12, added contrail to bullet and changed impact sound to default C&C. Minimum range 2 given.
Napalm is currently very ineffective; increased spread to 20 range to make more likely to kill targets, ROF slightly increased
MRLS rocket ranged increased from 8 to 12, with minimum range 2.
Guard tower range increased from 4 to 5 (Pillbox is 6, for comparison) and damage increased from 20 to 40.
Grenadier death explosion reduced in damage from 25-10 and in blast radius.
When an arty in a group of them dies, each individual arty only has a 75% chance of perpetuating the genocide of arty.... so usually, it'll stop before killing your whole line but not before seriously hurting it.
