Kaep will be taken if an owner thinks they can win with him. The league is about winning with the QB - no matter who it is (nothing new there). Owners want to win and win now, and the more dough they put out to get these hot shot 1st round draft picks the more pressure there is for the QB to win...and win now. I figure for most of the situations the 1st rounder gets to start or play most of his rookie season as an apprenticeship - no pressure to win (e.g., Murray, Jones, Haskins). The second year (barring injury) it's win or it's not looking very good (some rare exceptions with this when Mahomes sat his rookie season behind Smith - though he did start the last game of the season).Yes the Browns will be desperate and did well to get a win against the Bill who may or may not have hit the best level they will be already this year. The Bills offense is still a problem like the Rams and also the Bears.
As for Kapernick it smells like a stunt but according to Stephen A. Smith there will be 22 teams with reps at the workout. It's almost three years since he played so he won't get on the field this season you would think. I don't necessarily think that only teams that have a mobile QB will be interested. But it's interesting that QBs like Watson and Jackson are having success doing what Kaep and RGIII have been roundly criticized for with the inherent risks that go with that style of play. Cam and RGIII have certainly paid for it. The Bills QB looks like an accident waiting to happen and Trubisky just isn't playing well enough. But non mobile QBs like Goff are also having big issues. Kaep's biggest issue was reading the defense. He always had the arm and the running ability but it mustn't be forgotten that in his last season with the 49ers, his best WR was Jeremy Kerley and Chip Kelly basically said in an interview that he ran the ball so much because he had no options. The offense they had was injured and it was a second rate one anyway so Kaep probably did shoulder too much of the blame in a two win team.
Tremendous pressure this year for Mayfield, Allen, Darnold & Jackson. Though Darnold may get some slack because he missed so many games due to illness, next year will certainly be his pressure cooker. Allen has got his club at 6-3 and is looking good (though he needs to avoid getting injured.). Jackson is exceeding expectations with Baltimore at an amazing 7-2. The Ravens look like geniuses drafting Jackson and dumping Flaaco where it's crystal clear now that Elway screwed up big time by taking a QB that's too much of an injury risk despite winning a SB. And Mayfield had better turn it around quickly and get the Browns in playoff contention or he'll be categorized in that bust mode. QBs selected as "thee" #1 overall pick are expected to perform miracles sooner than later (no surprises there and it will be Murray's time next year). And Rosen looks like he should have been taken in the 3rd round - now a backup behind Fitzpatrick! Lol.
Owners really don't care how a QB is playing as long as the teams wins. Look at the situation at Tennessee: Mariota, statistically, wasn't playing that bad but the team was struggling when the Tennessee offense was pathetic losing 16-0 to Denver a month ago. Consequently, Mariota is benched and in comes Tannehill who has won 3 out of the last 4 including that shocker in KC with the Titans right back in the division hunt at 5-5. And this is "Marcus Mariota" we're talking about - a 2nd OA pick and a QB who has taken this team to the playoffs before.
Even the usual sub-par lousy Bengals couldn't take it anymore benching Dalton for Ryan Finley. Lol (I can see the Bengals in the hunt next year for the likes of Tua, Burrow, Herbert, etc.).
You mentioned Trubisky: He' s starting to sway to the bust category. Another 2nd OA pick who's not getting the job done (I'm now hearing some scuttlebutt with Cam maybe interested in going to Chicago? Hmmm). The Bears sit at 4-5 and are quickly falling out of contention with GB & Minn running away. Interestingly, there's an article that reports that Fox never wanted Trubisky (he was sold on Watson) but the GM never consulted with him and drafted Trubisky anyway!
The Chicago Bears had Mitch Trubisky as their top QB in the 2017 NFL draft, but their former coach had another passer he reportedly preferred.