I think you're confusing CRM and ergonomics. While the ergonomics certainly have taken a turn for the worse by installing physical barriers, good CRM is a way of mentaly and communicatively overcoming those barriers. But you'll have to adjust your procedures and develop something that will work under the new circumstances, as the old routines no longer work.
Flying an offshore helicopter with no rear crew and only a small curtain to seperate me from my pax, my situation is totally different form yours but I think you can see my point.