The undesirable but most likely reality.

Somebody will take the job but then everyone will be disappointed cuz they didn’t get one of the top candidates and when he goes 7-10 due to bad bad cap, average QB and several aging vets that you can’t cut because of of accelerated cap hits, everyone will be calling for his head…. So what did you gain?
Everyone seems too many...

That very well could be... but as Saints fans, we should know better. The Saints have had not 1, but 2 coaches that came in and completely changed the franchise: Jim Mora and Sean Payton. Mora with Bobby Hebert (who can be accused of many things, but not of being an elite QB) and a bunch of USFL players who were rejected by the NFL; and Payton with a QB who was decent in SD, but was ran out town with a shoulder no one had any idea if it was going to hold, and 33 other rejects from other teams to boot.

As for cap space, in the NFL you can always find a situation to make an argument for or against anything: I'm looking at the Vikings... they got a reject QB who was declared a bust and is on his 4th team, Spotrac (if I am reading it correctly) says they got $66M in dead money, and they are 5-0.

Changes may or may not work. But not making changes usually doesn't yield a different result.