Something I’ve discovered about big groups and small groups over the years: Large groups can (unsurprisingly) handle bigger challenges. They can muster more dice to take on tough foes. Smaller groups will have smaller pools. BUT! Large groups tend to be brittle while small groups are more resilient.

You note that the group generated 11 dispo for a drive off conflict. It’s a big number, but that’s one or two points of dispo for each character. Any decent attack or feint by the opposition is likely to knock out several characters.

Smaller groups generate less overall disposition but usually get three or four points each when they’re distributed. That means that a character in a smaller group can often weather an attack or feint and keep going.