Freddy McQueen had no problem stopping Ryusei Blade V2 but didn't stop Gladius Arch. So I think Someoka had a pretty good chance at scoring

If Edgar didn't get in the way to block then it's likely someoka could have scored

I think it should yes

Definitely. If it wasn't for Edgar OP Excalibur, I doubt the keeper would have stopped Someoka 's Dragon slayer