Agreed. Bethany isn't supposed to be in the least bit stupid which is why she runs rings around the dumbed-down Sarah and Gail.
Everyone's forgotten that little detail, including the scriptwriters. Surely Jack's nearly old enough to go to school anyway? He'll be five in September (although he looks younger).
I liked Sally and Tim's scenes and thought it made a nice change to give the actors something serious to work with. The characters are polar opposite so there's bound to be lots of friction between them. As long as there's still the underlying warmth, I don't mind some ups and downs in their relationship.
I was surprised about that as Steph seems nearer to thirty to me. However, I googled Tisha Merry and she's around 21, so the casting is unusually age appropriate for Corrie in this case.