When thinking about how games are likely to play out, this reminds me of a planeswalker-heavy Superfriends style of deck, but without the vulnerabilities that planeswalkers have in Commander
When out it can be a bit of a chilling effect as people may not drop things you'll move to and beat them with before they swing
Yes, they can counter creature spells (they are no different to other spells)
This means you can easily play several songs in a row with Powerline in play , especially if you are lucky enough to have both Powerline and Max Goof on the table at once
The tokens give us fodder to sacrifice for symmetrical sacc effects, and they also give us a wincon when combined with your creatures and Overrun effects
It all started, of course, with the Limited Edition Alpha