Thanks Red Terror, found it:
Why has Relic done this?
Weird. It could have been buffed because i remember some patch notes about bringing ability AoE's in line with their animation. I know that was the reasoning for railway arty and the AOE decrease to 240mm (or maybe I'm making stuff up?) They could have done the same for the stuka, except the way CAS is complained about in this game they decided to ninja it instead?
The other option is to buff abilities that are easy to dodge to make them worthwhile?
But who knows for sure. I thought it seemed to be destroying buildings a little easier in team games, but CAS really isn't meta anymore so I don't see it very often.