Personally I think it's no big deal, but I find it slightly annoying when i walk up a 1 inch bump and start sliding... This isn't only outside the castle. This is in Bob omb battlefield, and thwomps fortress. just want to show y'all.

Obviously, I know you can just long jump up these, but sometimes ill run, and just slide.

Yeah people have already found this, I think ILoveSMB said he was gonna make Mario a lot less slidy when version 1.4 comes out. For now you'll have to deal with it :/