I finally finished it this weekend - I didn't find end boss to be as disappointing as people tend to say, but it was nothing great either.
There is part toward the end that really reignited my hope for potential LEGO Zelda and coop play - not that you actually get to play like in LEGO games, but I could see the potential there.
In the end, I remain at 6/10 - it is descent experience, but nothing more than that. And certainly not worth $60, that actual proper AAA Zelda (no matter what I think of BotW) cost.