Personally I liked to see Lori leaving home for College as it would changed the sibling dynamic abit. Like for one thing, I would liked to see an episode were the sibling argue or compete each other at who would be the "eldest" when they all think Leni isn't up for it.
Granted seeing Lincoln and friends going to middle school would be interesting too!
I almost feel like there's potential for a rather sad plotline where it's like Leni is so dumb that she keeps forgetting that Lori left home for college, and spends a great deal of time (weeks or so) wallowing in the room all by herself, wondering where Lori is, and starts feeling really lonely at night because Lori isn't in the room with her.
This is a great question. They all seem interesting. Especially Lincoln and Clyde being teenagers. Ari did create a Teenage Clyde so I'm assuming we could get an episode set in the future like with Phineas and Ferb did. Anyway, I'd like to see Lori go off to college, Lincoln have his first day of middle school, etc. I agree with D'Snowth. Lucy's eyes are hidden for a reason or we would've seen them already. Something else I'd like to see is how Lynn handles her first day of high school considering she had a hard time starting middle school.