I think snell is a slightly less better offensive player but a substantially better defender, making him the better overall player (who's younger too). Snell is making marginally less than Patty is on their respective new deals. I don't think Snell is a reason for Patty to get paid more.
Frankly, I thought the FO should have moved on from patty. He doesn't move the needle for this team so why commit more money long term?
I don't see why you have to move LMA. If he's truly disgruntled why does he take his player option? Either he declines and is a de facto expiring or is not and has value that can be traded. Both preserve 2018. But regardless, you have other 2018 contracts coming off the books, which is all the more reason not to throw more long term money at mediocre players like patty