No, we did not. Fields has had way more chances to prove he's not good vs. 1 season for Howell.
Fields has a very, very bad time to throw across every season now. He simply does not see what he needs to see (or he does see it and doesn't believe he can do anything with it). They've changed philosophy, receivers, etc. and the results remain pretty much the same.
Howell, on the other hand, did not have a particularly bad time-to-throw last year. He just overestimates what he can do. He has not adjusted to NFL game speed. It leads to him thinking he can do things vs. NFL defensive players that he just can't actually do.
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I don't think the odds are great that Howell ever becomes an above average starter in the league because that's generally not how these things go. But I can see where his issues can be fixed and can envision a path that the Seahawks coaching staff could put him on to get there.
I will be legitimately shocked if Fields ever becomes an above average starter. He simply doesn't seem to know what to do as a QB. Some kind of Pete-ball on steroids might work for him but I don't think he has the same arm talent that Russ had to actually get to that level.