1. No, Predator doesn't have any strings that leave the opponent standing and plus enough to get the disc out.Question- do you know of any string or move (without knocking your opponent down) plus enough on hit to get a disc out and still be safe? say after a cancel on hit for example.
Also you said you haven't really found a use for ex disc- there is a set up to get an unblockable armour breaking set up in the corner with ex disc's
2. Its really hard for him to break armor now because a lot of armor absorbs two hits. I still have to lab out new post patch armor breaking setups. Ex disc has very slow startup so I can't see there being any setups to break 2 hitting armored moves I still think the best way to use ex disc is when the opponent has low health and you knock them down with f4. They are forced to block the next string, even if they delay wakeup.