After playing in the regional this weekend, I hate to say it, but I agree with this decision. I wasn't willing to push too hard in one direction or another, because I think the game is young and I trust the developers. However, at this point in the game, even if there are decks that can do well against this deck, I think having a deck that is just so obviously better than any other light side option is extremely bad for the health of the game.
The real problem is that this deck closes down the option pool. By being far and away the most consistent and powerful light side deck, it makes running anything else tough. This means both light and dark side decks get absurdly similar. The nice thing about a restricted list is that if in a year this becomes a lot less potent because of the options the other affiliations have, they can easily unrestrict these cards.
After coming away on Saturday from the regional, instead of looking forward to the next one I was dreading having to go through another day of smugglers in every single game (both me and my opponent). At the end of the day, this combo turned the game into something dramatically different than it was before and as it stands, I support this decision.
Super excited to see what happens to decks for the next round of regionals!