Sorry, it wasn't the plaid I found particularly interesting - it was the Ennisian brown and tan that seems new. No one needs to agree with me.
I agree that this could be significant!
I think the plaid could be important since Ennis is predominantly the plaid-wearing cowboy... and never solid colored shirts. This seems especially possible since some of the plaid shirts appear to be at least slightly western in style and tailoring. And, the brown is definitely an Ennis color (I'm not so sure about the black though
). I think the plaid shirt is a definite sign that Jake is a Brokie (as if there was ever any doubt).
I think it's a lovely observation Elle.