Yes, Bendis is a big offender for that as well especially with how he treated Wanda with Avengers Disassembled. I didn't catch Jason Aaron's Avengers...
I agree, I feel she was killed off too quickly. I'd rather they hadn't reintroduced her on Genosha at all and instead left her missing for some time...
That's going to happen too based on what I remember seeing for the reactions with Steve. That he didn't end up with Bucky or Sam or basically anyone...
I'm not sure. I skipped all that Jason Aaron stuff but I did Google it and it looks like it was retconned. Thor was attacked as an infant and died so...