Bottom 6 is the middle 6 , but I agree with fourth linersWow did you just switched from bottom 6 to middle 6 mid argument? Not the same thing. We totally should develop middle 6 players, it’s the 4th liners I couldn’t care less. Sure it’s not for depth but you can always sign them for less than 1M or trade for them for a 5-7th pick.
Defensemen you can never have too many and decent depth D are still expensive and hard to get, so yes we should develop those. 4th liners however, I don’t really care.
However , you should have a plug on the fourth line ready to go