2.I think the the silver age supergirl here works on multiple levels, both as a cipher of the audience and it serves to show how the 'many happy returns' type supergirl just can't work long term for a female audience.
3.As for the Turner/Churchill skinniness, I was really thin when I was 16 and I got a bit offended when I saw comments like 'eat a sandwich'. You shouldn't eat when you are not hungry. Some girls are fat, some girls are skinny and some are in the middle why shouldn't the comic reflect that?
4. current supergirl crys to much (I get the circumstances are sad but leave it off a bit, have her get angry more) and doesn't have half the time devoted to her character that she did prior to Sterling Gates.He's too busy with Superwoman/7734/retconning Reactron etc to focus on her
5. Current Supergirl has lost her independance, she's now roomies with Lana Lang rather than living in her own apartment. She needs permission to stay over when she had her own place. How lame is that?