Melinda disgusts me as well. It seems she is intenionally driving a wedge in Bruce's marriage just to prove a point. She bothers me much more than Bruce because Bruce is at a low point in his marriage (I hate to make excuses for him because I'm not very fond of him) and he's vulnerable.
Susan needs to keep fighting those feelings for Roger. It isn't fair to anybody involved to act on them. You mentioned her hesitation is maybe because of her bonds with Janet and Bruce but I would add her bond with Roger as well. Acting on their sudden intense attraction, or as Roger calls it "love", would be a bad move and it would put much more than her relationship with Janet at risk. Dare I think that Trina would lose some respect for her too? Frankly, I think she already has.
I think you're right about how Trina may have been feeling when she woke up that morning to another couple in their bed. Plus, of course, she was sick.
I really do love Janet's evolution on this show. I'm wondering where she will go next. Will she make the decision to stay (whether he goes or not)? I keep waiting for Roger to figure out that she is what is best for him.
I liked the Lori and Doug stuff from this last episode. There was a quiet understanding between her and Susan when she was leaving. Susan knew she was going to (where was it?) Guatemala (?) but pretended to believe she was just going to Doug's. I like that he left without her out of respect for her schooling and for her.
BJ and Samantha though... chick is supposed to only be gone for six weeks. Or did I miss something?
So after however many episodes, I find that what saves the show for me is The Deckers, Janet, Lori and Doug. Funny that.