Yeah I heard some of the tests, they were doing them out of BWI, not for a flight I was on but for some of the other nearby flights.Thanks for the advice. I think we will break into two groups as you suggested just in case. Either that or maybe try EBCI for one group to avoid the strict gate attendant problem.
On the age limit increase, it is apparently just a test. SW may find that it's more trouble than it's worth. I read some interesting ideas on another forum for how they could mitigate the problem, like calling family boarding after all EBCI's are on board, requiring families to sit near the back of the plane, etc. One poster made a good point that if they can figure out a system that works at MCO, where there are a ton of families, then that system should work fine for the rest of their flights.
The problem with that is BWI although it is the closest thing SW has to a hub (along with Midway) doesn't get a high percentage of kids. With DC so close I have found the flights I take to BWI seem to be very high in business travelers (flights to BWI tend to be the ones where there are 10-15 A listers and only 4-5 small children) Raising the age to 11 on those flights and we are talking 15 kids max still
SW will never be able to eliminate the last minute scramble though unless they completely change boarding. There will also be the chance that a family with a 3 year old has a late connection and due to that doesn't get to the boarding area until the Cs are boarding and only middle seats are left. Well no actually they could handle that one... the gate agent should be able to tell they have a young kid on a late connection and have the FA save two seats towards the back together for them.