Im a devoted fan of mechanics involving tapping creatures, and I think its an excellent idea to re-use the familiar, evocative template of crew for similar concepts: first for saddling mounts in Outlaws of Thunder Junction , and now this
You choose the Attraction as the ability is resolving
Its second ability is also exponentially better in a format where you have multiple opponents, making it a fine fit in Commander
I think it would be twisting the knife to go back on what the RC decided, and would validate those who made threats
Now, these don't enter the battlefield at the same time, but with a bit of stack wrangling you can get the same effect
It is one of the rarest cards in the way of the Shiny Cards, with listings going as high as $50k