Lots of weirdness here. Lots and lots. Lets start at a place near and dear to my heart; dispelling a narrative that is factually incorrect by way of hard evidence:
1) "Koetter needs to get Jameis in a rhythm early by going No Huddle where he flourishes."
No Huddle Passer Rating: 81.0
Huddle Passer Rating: 94.4
2) I've said it several times before, but the overwhelming bulk of Jameis's poor play in 2017 was on 2nd down where he featured a 77.9 Passer Rating. This was the primary (with running game being secondary) reason for our struggles on 3rd down through the first 11 games of the season.
3) How about a really weird one? We know Jameis had poor first halfs compared to second; 82.7 Passer Rating vs 102.7. However, check this out. The overwhelming bulk of his poor play was in the 2nd quarter where he had a 66.8 Passer Rating (!), while he was over 100 in the other 3 quarters.
4) How about weirder still?
In October, Jameis had great Pass Protection with his entire Offensive Line intact. They were top 7 in Pass Pro at that point and one of the very tops in the league in Time to Throw. During those 5 games, he was only Sacked 7 times, yet his Passer Rating was only 89.7 and he ran the ball for only 36 yards.
In December, when Marpet and Dot were out (# 7 Center and # 7 OT in the NFL), our Pass Pro struggled quite a bit and was truly catastrophic on certain plays. During those 5 games, Jameis was under pressure quite a bit and was actually Sacked 20 (!) times...yet his Passer Rating balooned almost 10 points to 99.2 and he ran the ball for 84 yards. His completion % was up 7 points and his Y/A was up a yard and change.
I've said this before. Jameis plays better when things aren't going well around him. He played better overall when his skill position players were worse/injured in 2016 and he QBed better last year when his OL was in shambles. Again, my sense is this is due to the "greedy" mental framework that DK invokes a lot when it comes to Jameis. When he feels like there are big plays out there to be made (due to personnel riches), his mental accounting (opportunity cost, cost/benefit analysis) goes a little haywire and he gets overzealous. When the opposite is true (a dearth of personnel riches) he throttles back that tendency and becomes more inclined to take what the defense gives him.