half_empty
when helping with Noahs hitting you could use Jake's foot placement make a chalk out line of Jake's feet when his is in ready stance then where his foot is after then have Noah swing the bat if the chalk smudges or is not on the landing point then he not balanced enough keep the swing practice going til his feet are landing on point 75% of the time then do it when the guys pitch to him most likely Noah's trouble is timing he's to much in a hurry to get on base that he messes with his timing when Jake first helped he got better I bet when Jake adjusted Noah the first time it made Noah slow down wanting to get on is a good thing but to get on you first need to make contact and bloop it were no one can get it.
I think that having Noah's copy Jake's foot placement would be a horrible idea since jake an noah have different batting styles with jake being pure technique and noah being more athletic. especially since both of them are in the middle of a growth spurt having there foot placement and bat swing change unconsciously to their body. noah batting form is not the issue if he needs to work on something it'll probably be his pitch read.