I hope I don't come off sounding like an ass, because I really don't mean to, but I'd like to address some of your concerns. This has been said elsewhere on this forum in many different ways, but if you're worried that modifying your car will void your warranty or cause you to fail emissions then you probably shouldn't modify your car at all. Or at least wait until the warranty expires. You're somewhat protected under the M-MWA, but there's a lot of grey there. If you're worried about it, then don't do it. Any 2016 FiST that you install an intake on WILL throw and evap purge canister emissions CEL without an adapter.
Getting something 50 State emissions legal or CARB certified costs money and time. Ron put this together to help out frustrated people that were getting CEL's. From what he said, it was a one time only production run, so it wouldn't make sense to pursue getting it certified.
As for the boost bleed line that was eliminated, it's not new to the 2016s. Previous year model FiSTs have it as well, and I think it's been pretty much covered before on a previous thread. If you do a forum search for something like "boost bleed/purge line" it may have more info for you. People have run with that line blocked off for years without issue, but as always, I encourage you to read up on it.
About Ron's attitude, well, he can answer that better than I. However I seriously doubt he was meaning to be condescending or be an ass. He's never been anything but a pleasure to deal with, at least for my part.