Justin Fields has improved - but enough?

It tells me Poles is making a huge bet on Flus.  Let's ignore the record and the 4th Q collapses and all that.  Say he gets a complete pass for his first 2 years.  Even so, Flus's near entire staff has been let go now.  Only the STC and OL coach are left.  Poles is entrusting this guy to rebuild 3/4 of the coaching staff and get it right when he clearly didn't get it right to begin with.  Poles clearly LOVES the Flus so I hope he's correct.

If they don't draft a QB and decide to stick with Fields, how could it not be a decisive year?  What if things don't go well and they finish with 6th wins?  Fields would certainly be done here and I can't see Flus surviving that either.  I'm reminding myself of 2014 and 2019 which were two other seasons where the natural progression turned out to be not very natural. 

You think that potential new OC's would be happy to take on a do-or-die 4th year for Fields.  OK, we will have to agree to disagree on that one.  I think many top candidates would be reluctant to take that on and would much prefer to start fresh with Caleb (or whoever) and have more runway to work with.

As for Herbert, I don't know his coaching history but ok I'll take your word for it.  That's certainly not the typical plan.  His career passing stats in his first 3 seasons averaged 4700 yards and 31 TDs per yr.  Fields would have to roughly DOUBLE to reach that.  As a passer Herbert >> Fields so not sure the comparison is apt at all.  Turns out Herbert is really really good and Fields is well.....not so good.  

Regarding a rookie, the point is to NOT have to constantly reshuffle his scheme and OC once he hits the NFL.  Wasn't that one of the biggest complaints made about Fields first year being ruined and wasted by Nagy?