My thought on sideboarding for you guys...take it for what it is worth since I am a Steamer (won't pay to do the XBone thing).
Everyone will know everyone's decklists ahead of time, and who you are playing. So, if you go the sideboarding route...
Create one baseline deck, the one you take into the first match of every game.
Then, copy it and adjust it, based off of your previously stated sideboard, and prior to your game that week, make a sideboarded deck for that opponent you have coming up. Hell, make 2 or 3, who cares, as long has it has the same number of the same cards within the main and sideboard. That takes care of people having to wait for the players to sideboard. Then, be careful to pick the correct decks and play.
That would be the way I would do it.
Hakeem, good on you bro for jumping on this. Makes me wish (briefly) I was an XBoner. Fortunately, I have Nighthawk who, while not rooting for me (you foul, bloody limey, you), but he is putting on one hell of a Showdown.
@ Megabeast...nice to see you back.
Can't join as no Xbone (will not do a CGB lol) but yes the motivation behind the tourney and the content is solid and proved as expected popular.
We ran sideboards in iOS and I think it did work, at least you are not locked in. Agree with different builds based on core deck and exactly what I did in iOS personally.
I still think having your first round before a reveal of decklists would enhance it. I get why published decklists and people viewing and commenting or blogging about it is important but facing your first match blind! Just my 2penneth. I know Barney is anti sideboarding and he won the last so maybe sideboarding is a no go. You should though take a view from your partcipants.
It's cool too another feature will be shaping and deciding the meta, one downside (just my opinion) was that the meta was all but solved prior to the tournaments. It was still good to see some variety but on paper everyone should have rocked up with a mosstard ramp deck! I am glad they didn't. I still beast's 5cc converge was the boldest choice so I am sure there will be similar for next!