Keep in mind that your goal is to attract people that AREN’T playing this all the time online as well. The first SC tournament we had was primarily made of people that didn’t play online often. When you start putting jargon on there like “blizz maps” the average player will have the same reaction I just had: “what the hell does that mean?” I mean yeah I inferred that it’s official Blizzard maps but when a potential player sees that and doesn’t understand you automatically turn them off to the tournament because they assume, weeks before the event, that it’s for pros only. No matter what you put out after that they’ll automatically ignore it because in their mind it’s a pros-only event.
I’d recommend putting “1v1” and “Official maps” but anything beyond that will be too daunting. The pros will see it and know that it’ll be a “best of” system and that you likely won’t be able to change races mid-match while the non-pros will also get the basic info they need to decide whether or not to play. Too much info risks cluttering the flier and they’re only going to see it for an average of 5 seconds unless they stop everything they’re doing to read it. The most important thing is that in those 5 seconds they get the game, date, and location. If they have to stop to get any of that they likely won’t.