It's about the process of deciding stages. Stage striking is what you'd normally do on the first game of a tournament stage to decide the opening stage. Both players play an RPS, after which the winner strikes 2 stages he/she doesn't want to play on; then, the loser strikes 3 stages he/she doesn't want; and finally, the RPS winner then decides where to play out of the two remaining stages, hence 2-3-1 (2 strikes; 3 strikes; 1 strike). Normally up to this point it was always 1-2-1 because there were always 5 starter stages in previous games, but I think with Ultimate it's time we expand the list.
The counterpick part is for games after game 1, and from then all of those stages are available. Before the loser of the last game gets to choose the stage counterpick, the winner can ban 3 stages he/she doesn't want to play on. "DSR" stands for "Dave's Stupid Rule". I don't know where the name came from, but it was a rule where you can also not counterpick a stage you've already won on that set; but the Modified version is a newer take on it where you can only not pick the last stage you've won on. In the end, it's a little complicated and maybe we could do without it if you'd please - having a proper stage list means we're always gonna be playing on decent stages even without counterpick bans. Personally, I wouldn't mind not having them, and I'm probably one of the most competitive players around here.
Well, the accepted Smash 4 ruleset had 5 starting stages and they always started in Smashville, so, there. The banning system isn't really more complex than with 5 stages (1-2-1 for 5 stages, 2-3-1 for 7 stages), but I think if people here don't wanna go through that, they can just straight up pick a stage they agree on.
...Yeah but the thing is, no stage in Smash history has ever been added to a stage list. It's literally never happened, so it's unreasonable to believe that somehow, this time, the community will be able to embrace a new stage popping up on the stagelist just because its glitches have been fixed. If anything, I find it more likely that people will create new excuses to keep said stages banned. In the end, I think bugs are something we'll just have to deal with this early in a game's lifespan - it was the same with Smash 4, which early on had a lot of different mechanics such as Vectoring-DI, DACUS, and that bizarre Wario Waft glitch. It's just how things go at this stage... I'd rather risk having all these stages there, and only ban them if they do prove to be problematic and aren't fixed post-release. Also, Hazardless Frigate Orpheon is already on the stagelist in the first place, saying it should replace FoD or Lylat is nonsense since they're vastly different stages.
Sure, but both Melee and Brawl did as well, and neither ran into those issues. Smash 4's problem was more about how polarizing many of its starter stages were (often giving a notable advantage to one character or the other), not to mention having Lylat included. SV was really the only one that was widely "neutral."
While saying that no stages have ever been added isn't exactly true (Dreamland as DLC, Lylat was taken off and then re-added), the reason why it's rarely happened largely been because those stages had obvious problems that were discovered and they were never fixed. There's no precedent that suggests people wouldn't be willing to embrace a stage if its problems were solved for. While it's not exactly the same thing, Dreamland was added virtually as soon as it was added to the game. I think this depiction of Smash players who are sticks in the mud that are unable to change their approach to a ruleset is just wrong; people have been willing to change to allow a stage that was DLC, and they'd certainly be willing to change if problems were solved.
Plus, even if it were an accurate description, this is a website's league, not a tournament using official national rulesets. We (or more accurately, Truck) can change stuff ourselves if we want. There's no reason why we have to be beholden to the same restrictions as everyone else.
Frigate Orpheon is certainly different, my intent was not to suggest similar stages; rather simply other ones that could be legal.