If they somehow didn’t add UA (or Oregon, Utah et al.) to get to 14, they could always look elsewhere besides UConn. WSU? Memphis? Etc…
We’re talking “worst case scenario”. This is like the baseline of a worst case scenario (we’re stuck at 13, not able to create the 9-game schedule our TV contract requires, thus invalidating it).
While I’m not a steel cupper in my fandom, you honestly don’t want to underestimate the kind of rabbit hole my imagination can take a worst case scenario.