I'm not sure sliders will solve that. I think momentum and definately home field advantage play a much bigger role in that. I find that I can struggle on the road and have an advantage at home. I think home teams get roughly a "half grade boost". A B- team may become a B or B+ team at home. Do you ever struggle with poor teams at home? I personally think that aspect is done well. Momentum can lead to blowouts but I am dealing with it fairly well for me.
Have you tried playing with HFA off? It usually leads to closer contests but you don't have the crowd effect. Many people turned HFA off in '06 because of this although I didn't mind it (on AA).