I think there are a lot of things that could and should be done over.
I agree that Lindsay's entrance should have been done better. I understand that TPTB wanted a second female member of the team, but I think it would have ben better if they'd waited. I'd have liked to have seen more on Hawkes' development as a CSI. They really missed a chance to give him some good development.
I also agree with the whole "Tanglewood" storyline. I want to know what happened with Louie, if he's dead or alive or what.
Agree with "All Access." I understand that domestic violence can happen to anyone, but the way it happened to Stella? just a bit unrealistic, IMO. It would have worked better if it was a random stalker who'd clubbed her over the head and tied her up or something.
Aiden's exit and death. She never struck me as the type to get so emotionally involved in things. She certainly never struck me as the type to be so obsessed as to completely lose her perspective and stalk someone, and then let them lure her to her death. I'd have liked it better if she were either killed in the line of duty or there was a shooting similar to Danny's in "On the Job" but she wasn't exonerated.
Lindsay's Dark Secret. It just felt rushed and unrealistic to me. Plus, the way it changed her whole character was not cool. The way she was in "Manhattan Manhunt, where she's fine with all the blood and teenage girls, then "Silent Night" she bails from the crime scene and gets all hysterically weepy at the dead girl's body. Then has no adverse reactions after the trial is over. Not realistic.
The whole Danny and Lindsay relationship, and the attendant lack of Character Developmnent for Lindsay. They really made Danny into Lindsay's lapdog, IMO. The idea of him flying all the way out to Montana for her like a Lovesick puppy....ick. Also, the idea of Lindsay not having any character development independent of Danny is annoying. She should be able to stand on her own, especially because she's in the main credits of the show. I actually liked her in season 2. She was fun and lively. then, after the dark secret and when she got stapled to Danny, she became this weepy, mopey, unpleasant shrew somehow. Me no want.
Ditto for the Danny and Lindsay Baby. Just Yuck. It makes her seem so utterly weak willed and pathetic. It also makes Danny seem like a slut who'll do it with anyone just because.
I wish they could have done something with Anna Belknap's pregnancy other than writing it in to the show. Why couldn't she have needed some time back in Montana. They could have given her some better character development and avoided a jump the shark moment.
I haven't seen much of season 5 due to schedule things, so until I do, I'm going to refrain from commenting on those eps/storylines I haven't seen.