I see a lot of overreactions in this thread and the poll. While I've lost my faith in Hynes, I think that Shero has had overall positive impact during his tenure here and while I think that Hynes shouldn't be our head coach, come October 2020, I still have lots of faith in Ray Shero and here's why:
1) The roster he inherited after 2014-15 was atrocious and had almost no legitimate prospects due to the way Lou managed this team. The best scorer of this team in that season was Adam Henrique with 43 points. Btw. emotional posters on this forum seem to ignore "the roster factor", while criticizing coaches, heavily criticized DeBoer went to SJS and made SCF there.
2) The second point is similar to the first point but to me it's quite clear that it was roster quality that was the issue, not Hynes. In his first season Hynes achieved 84 pts with awful roster. In next 3 years, there were playoffs once and very bad seasons twice but you couldn't honestly consider the pieces he had to work with as good. This is the first season where you could say that Hynes' team is underachieving compared to the roster quality but the sample size is too small and this roster isn't top 10 in the NHL on paper, I'd say it's a bubble team. I agree that this season Hynes hasn't been solution but he's not the main problem (roster quality is), therefore firing Hynes wouldn't magically turn this team into contender. Not to mention that the legitimate candidates to replace him aren't available.
3) While I criticized Mueller and Grabner trades (not in the hindsight but at the moment they were made) due to the fact that we've overpaid for the first one and weren't in the position to give up Rykov + 2nd for a rental, I have to say that Shero has done decent job in trades. Palms? Great steal. Hallsy? Another steal. Vatanen? Win-win that was very reasonable move. Gusev? Gamble that made sense given that we had the cap space. Subban? Former Vezina d-man on a team that desperately needed help. There were no long-term FA signings that would handcuff us to brutal contracts, there was no gambling with the future (a'la Lou and his Cory trade), there was and still is a patient rebuild (except this Grabner trade but I'm going to forgive one mistake and hope Shero learns from that).
4) Now, if you compare the roster in 2015 and the roster we have now, you have to admit he has done fantastic job. Is this roster competitive already? No, it's not. Hischier, Hughes and Zacha still need more seasoning. Hall may not be the leader we thought he'd become but if you're offered Hall for Larsson, you have no choice but to accept it. I think there are some issues with Hall (read Ference's opinion about the toxic culture that was in EDM) but if there were no issues with Hall, Chiarelli would keep him. Subban is past his peak but if he wasn't, we wouldn't get him so cheap etc.
To sum it up, people who think that you could turn a team that was worse than expansion team in 2015 into a legit contender in 4 years are delusional. Lou left this team in an absolutely awful state and is #1 reason why we are still in the rebuild. Refusing to rebuild after Kovalchuk left was a mistake and compared to late Lou, Shero is doing a good job imo.