Husso is better than Binnington. This 'hot streak' and 'unproven' talk has truth to it - but ignoring Husso's actual ability is a fundamental mistake on evaluating goaltenders. Goaltenders are historically hot and cold, and some goaltenders hit their stride mid to late 20's (there are many examples). Heck, the goalie Husso stole the net from came out of nowhere and won a cup.
Husso isn't a backup goaltender anymore. He's a goalie who has been red hot and has stolen the net from Binnington. This is the trajectory many goalies have to follow to becoming a legitimate starter. I would say the likelihood of Husso being a better goaltender than Binnington for the next 5 years is quite high. My hunch is that the Blues understand the volatility of goaltenders and will want to hold both so a mistake can be avoided. Trading Husso could end up being a disaster and his value isn't high enough to take advantage of a sell high player.
A lot of posters have scoffed or laughed at the idea of a Husso for Holloway type deal. I don't think the Blues would take that deal if it was real anyways - a typical over-rating of a young prospect that was drafted high.
Your argument that "the likelihood of Husso being a better goaltender than Binnington for the next five years is quite high" is totally unsupported.
This is Binnington's first struggle with adversity at the NHL level. He's never lost his NHL starter job to anyone before. Equally as knowingly as you state the trajectory of goalies certainly anyone confident enough to do that should know that goalies go through swings. Binnington is being written off on his first swing, and treated like actually winning the Cup was the same as Scott Darling or some nothing shlub like that being hot for a month. The guy had 56 starts, went 40-15-1 in them and won three games under the utmost crucible of pressure in Boston Garden. The idea that he could do this at 25 but can't at 28 because he was a one-hit wonder is clearly being fueled by people with a personality grudge.
No logical and calm analysis could just come up with "the likelihood is quite high" based on the facts you have in front of you. It's what people want to happen. The idea that Binnington could do what he did for the Blues people need to self-soothingly understand as a lucky fluke and not because talent resides in the guy which could resurface. It resides in the guy trying to unseat him, so obviously after 15 games this year, none of which are playoff games? I mean this is clownshow type analysis.