people who don't want to get cheesed by roy would SDI it. i haven't played any good roys myself, but somebody who has told me it's really obvious when roys will go for it since you have to go for that perfect spacing. my point is that it's not guaranteed. and just putting this out there, SDI is the future. it doesn't matter if pros don't do it even with the easy stuff sometimes, since that's a mistake on their part, not an excuse for others.
back throw into turn around down tilt should not be a consideration if it requires bad DI to work. an argument could be made if it's a mixup with the possibility of f throw and up throw, though i'm not sure why people would DI for up throw.
you seem to get my point with the down tilt on platforms thing. you need a hard read to get it at all, since peach has way better tools up close than roy has.
thank you magus. nice to know.