They're pretty retarded.
I'll never understand people who just yell "git gud" at people when the game is fundamentally flawed because of this mechanic. A person asking for discussion on a controversial mechanic is insinuated to be stupid, moronic, cancerous... when they're just calling for discussion and saying "hey, this has potential to be fucked up, can we talk about it". Please go away.
It's like a controller player in an FPS telling people to git gud when they're reliant on aim assist to do things they otherwise wouldn't be able to do through positioning, thinking, or execution. Using the mechanic because it exists is obviously the correct response, but ignoring how dreadfully bland it threatens to make the game is... extremely expected of your typical TYM poster. I don't know why I'm even surprised.
The 1+2+3 OS is a mechanic that plainly makes the game easier for the person executing, and harder for the person defending. Remember that this is already an extremely offense-favored game, and this makes offense easier. It does not promote reactivity, punishment, foresight... However it does promote spending about 10 minutes in the lab, figuring out which moves cancel into what on hit/block with the OS, finding the most optimal cancels, then getting free buffs to your pressure game that don't require you to think at all.
This mechanic literally makes it more difficult to defend, which is already really fucking hard in this game. It's harder to turtle up and block in this game than in most other modern FGs out there. At least we still have the buffer a punish while still holding block and your move comes out on the first frame mechanic! At least you can kinda do one sort of fucked up thing while defending, giving that a nice little boost. Yet nobody's complaining about that retarded mechanic that all the same removes the necessity of thought, practice, execution.... just hold block and mash buttons and if your character has a window to punish they'll auto-throw that shit out there without you ever having to commit to letting go of block.
You guys are morons and deserve all of these retarded no risk/high reward 50/50s that everyone on the outside completely hates about this game. It's like you actually want this game to be Marvel but without the skill ceiling and execution barrier, and instead with NRS characters smattered on top.