The "foolish mindset" remark for levity in response to you quote about them being foolish not to follow their board. It was sarcasm.
You also have to take into account Bruce Carter, who just got paid in FA. If we had kept him, LB wouldn't even be a topic for discussion. So, that's Lee, Carter, Hitchens and Wilber right off hand. Then you factor in how well we have done bringing in cheap FA's, McClain, Durant, Brinkley (who I think is very underrated) and Rivers (who may never play).
With all that in mind, I don't see any reason to reach for someone at 27, or take a player at 27 who may be nothing more than depth. I don't know who it is in the scouting/coaching department (McClay maybe?) but someone is very good at pinpointing specific qualities in linebackers that make them good fits for this defense. I don't think Lee is going anywhere unless he retires. Hitchens is going into his second year. RoMc is on a prove it deal, but there is no reason to believe if he proves it, they won't make a play for him. Brinkley is signed for multiple years.
I think we need a linebacker or two, but I don't think it's a pressing need. You can't draft for injury assurance. You have to go by your board and value. If we were to trade back and get Kendricks, I would be ecstatic, so it's not like I am saying avoid the position all together. I am just saying, I think a more impact (right away) player might be there.
Then again, all that said, I was really hoping for Peters until the most recent report came out. So I might be alright with Kendricks at 27 now. Just not entirely sure Kendricks is a significant upgrade from Perryman, who can be had much later. That is purely my opinion though. I am ok with smaller linebackers, particularly in this defense.
I'll also say this. I know very very little about McKinney, but if they believe he can be a good pass rusher as well as a stout middle LB, I would not be opposed to him at 27 either. I honestly don't know much about him though.