"I'd love to make the PLC a viable AV weapon without making it OP against infantry"

I've heard multiple DEVs state this and I want to know the reasoning behind the statement. Let me clarify why this statement doesn't make any sense:

-The plasma cannon deals two different types of damage, direct and splash.
-Direct damage is how much it deals on contact (primarily AV), while splash is how much it does within a small blast radius outwards from the point it hits
-Direct damage is enough to kill almost any suit except for the very heavily armored sentinels.
-Splash is almost never taken into account when it comes to dealing damage to vehicles.

So what does this mean?
It means that increasing direct damage won't have much effect at all against infantry, while increasing its effectiveness against vehicles. Even if the plasma cannon's direct damage was over 9000, it still would be exactly as effective as it is now against anything that isn't a vehicle. It would not be OP at all against infantry.
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CCP, is it really an issue for sentinels with tons of armor to not be 1-shotted by a skilled plasma cannon user that you won't buff it to be a more effective AV weapon?

Obviously there are plenty of other bugs and issues with that weapon (probably more than any other weapon in the game), but please tell us why increasing direct damage (i.e. making it more viable for AV) would make the weapon OP against infantry.