Starting getting pissed with the upgrade system after the 4/5th level.
I'd rather be raining down 60mm shells on infantry than one shot of the 155mm artillery piece that hits only one guy.
I'd like the 240 gunner to target guys getting ready to cross the line to do damage to my health, not the guys just coming into his zone.
I'd like the artillery to target the larger clump of enemies not a single guy.
I'd like my rocket units to not target the single guy but the truckload of guys...
I like it.. but my original 5 star rating has dropped to 3.