I don’t know if I do, or don’t agree, with removing Double Teams. But two thoughts to help move it forward..
1) identifying whether someone was at 2.9m vs 3.1m is a hard thing to actively/regularly monitor. I can see the argument that not having stoppages where players pace out distances would be an improvement.
2) beginners largely already* don’t understand/use the double-team rule, so removing that rule would not impact their experience of the game
* In my experience coaching at beginner levels, the rule around numbers of defenders within 3m of the disc is often not taught, or where it is, it’s ignored. And it doesn’t matter. The more the opposition double-teams, the quicker players learn to throw overheads and/or move the disc quicker than a ‘trap’ can set. Neither of those seem to hinder their enjoyment of the game, nor their development as players.