Uh, what? All of those things apply just as well to PVE. they aren't arguments for PVP.
And no, it's not the technic teams responsibility to rebalance the mods. It's they're responsibility to make a modpack that they deem to be worth the time it took them. That's it. Any other tweaking, changing, editing, rebalancing, reskinning, and other changes are the responsibility of the people playing.