That won't happen by "extending" running past icon's range.
I forget how long I'd been here exactly, ~4-6 months or so, got a 6 kill sortie no rearm after I finally got off the runway. It was sweet justice, field was deacked, a friendly and I finally got up, guess they all liked him instead, but I was on that day. Never repeated that performance to date to be exact, I've had 6kill sortie's since but they involved rearms and bomber kills.
Anyhow your wish as almost all of have stated would forseeably increase they amount of ganging, not decrease it. I see your train of thought that some might say I'm not going to gang 'cause "I don't know if I can put enough led in him" to get any credit. Yet, you see ppl here blow all kinds of E adv to come down and get an assist instead of fight the higher con. Maybe it's a let none get away mentality or a collection of I want an assist, he needs to die, etc.
Many long time and intelligent players have weighed in and they think it'll increase because now it's actually worth some perks to try and get that assist, gang or not. The sum of said players and their exp in years is probably older than you.