Yo guys, i'm having trouble with the spacies vs roy MU, he punish soooo hard. As you can see, I don't know any safe aproachs like, everything can lend in to a grab and death.
I destroy this guy with sheik, but I wanna know what to do with falco, this character is amazing
https://www.youtube.com/watch?v=SQAOwHfo5_g
Safe shield pressure is in fact one of the hardest parts of playing spacies, so don't feel bad about getting punished OOS a lot. To my understanding, there are two things you can do to be safer on shield as Falco (didn't watch the Fox match LOL). First, you can try to space your aerials as low to the ground as possible so that your attack hits as late as possible, hit subsequent fast falls and L cancels, and get your shine out as soon as possible (soon enough to stuff / prevent Marth / M2 shield grab maybe).
Secondly, you can try to space your aerials so that more often than not you land
behind your opponent. This is much less effective against characters like Marth and Mewtwo that can sometimes / always grab behind them (just don't try to do shield pressure on Mewtwo... just don't do it) but against Roy it should help out a lot in terms of preventing the opportunity for your opponent to make a conversion.
Also, it might be useful for you to check out Falco's
Shield Pressure Frame Data, and
some other things like that. Cross reference with
frame data on the matchup you're trying to improve upon, and try to see if anything pops up from there.