One of the few good parts of Secure was the ability to shadow capture the enemy's nodes when the teams go to the middle, or if you're just feeling cheeky. That came with the risk of getting 24 players coming after you, but it could possibly result in a 4v8 or 8v8 situation if maps are designed like this in the future.
My main point is, more firepower from role actions, battle high, even the Secure point's damage buff means that kills and progress can be made without the entire alliance present. And I LOVE that!
Honestly, if we had to split into more skirmishes (and have the ability to win by doing so) then the meta might turn into 6 premades on a team, just for the added coordination. Which would be awesome -- right now, either the entire alliance succeeds or nobody does. If I'm going in with 3 of my friends, I at least want us to say we did something cool rather than getting anchored.