As a note, intention isn't supposed to matter. The NBA ignores precedent all the time, but traditionally it's a 1 game suspension if it is reckless and not a basketball motion. This is a case of the traditional NBA double standard, if a role player does it, it's a suspension, if this was a regular season game... probably a suspension. You can tell in part by the big fine and the flagrant 2.
The upgrade is the funniest part since it's an admission he should have been ejected, but with no real bite, if Draymond ever actually gets to the limit on flagrants one will be downgraded.