For me, the absolutely greatest thing about this, hands down and by far has to do with the GROOVE of the Grateful Dead. That core rhythm engine of Phil and Bill and Bob. There is no other drummer that makes people dance to the groove pocket, that particularly deep funky thing like Kreutzman (with Phil and Bob). For me, that's worth catching a show. Those countless hundreds of hours spent dancing to the Grateful Dead, the profound experiences awakened from moving to that band in that way, it all points to Kreutzman.
And the choice between someone who sounds like Jerry vs someone who plays in that same musical spirit must have been a tough process for the boys. Personally, I get the Trey thing. He's perhaps the most capable and qualified and creative and dynamic "jam" guitarist out there who can totally, balls-out rip when it's called for. While he won't likely be very Jerry, he is apparently taking this very seriously, revisiting the entire history and catalog of his favorite band, and may really surprise people with how Dead-like his take on this may be.
Just my take.
... and it's just like any other day that's ever been...