That's your bar?
Lol at "they weren't CSI"
.
No, that's an example of short arc series that caters for short attention span audience that's prevailing force of todays TV target and programming. CSI was the first multi-season series that introduced ultra short story arc. It has classic hook (unusual,shocking or amusing death sequence) and machine gun delivery tactic (they "kill and investigate" minimum of two and maximum of four characters/arcs
per episode). They don't care about acting, delivery, tone, feel, scenery or cinematography, in fact most of the sets used in CSI, these days come from green screen ready made locations - all they want is to wrap up at least one of the arcs within two commercial breaks, otherwise, on the other side of 15-20 minute commercial break the audience either don't remember what they were watching or no longer care enough to stay tuned in.
The Wire, Sopranos and Mad Men is exact opposite of this tactic. It's about delivery, it's about actors, it's about long term viewer investment. You don't get to have a break (yes, you do in UK, but where available the HBO doesn't have them, it's start to end immersion channel), you don't get to leave for 15 minutes, return and still know what was going on thanks to conveniently placed "duh" in-conversation reminders. It's like a few day cruise on luxurious yacht, rather than short ride in motorboat. You are not going to remember every wave, every cloud and every turn, you are going to remember it was scenic, and you had a good time.