I guess they could repeat the same patterns with the younger kids that they showed with Lip and Ian -- blow off school, not care or aspire for something better, just finding a way to get over someone to pay the next set of bills or having a binge session of some kind.
Fiona and Lip have sabotaged themselves but they're not out so maybe they'll work towards something for awhile. Ian is currently doing that as a paramedic who beat odds to get that job. But maybe he'll mess up his relationship and he won't be able to stay on the job either.
Carl was a gangster, wised up and now does everything for his girlfriend. Debbie is now the criminal, discovering a way to fund a upper middle class type of lifestyle (nanny for the kid).
Rinse and repeat.