As far as I remember, they were removed because the original fnf creator was close to denouncing FF, and well, to avoid that, the creator removed them :( (At the time of this video, did the defaults still exist? As far as I remember, there were no "(new)" defaults and no classic defaults.
my rankings: #21: Retrospecter barely readable, and also very big #20: 3D arrows i don't even need to say why this is #20 #19: Diamond there's a lot of things bad about these, but idk what they are tbh #18: Fumo u can't even change the color + they're barely readable #17: Hazard can't change direction and just looks rlly bad overall #16: Pixel they're okay but not good #15: Square ripoff circle ahh notes #14: Circle plz don't jump me for this but in my opinion they're overrated also i'm gonna count the osu version as the same thing #13: Sussy too big #12: Taiko it's ok ig, never seen anyone actually use this tho #11: Stepmania it looks cool *TOP 10!* #10: Bar bar be like: _ _ _ _ anyways pretty good #9: Bloxin a little fat but not that bad ngl #8: DividedByZero it's pretty good but don't like the random hole in it #7: Exe 🍩 #6: Glitched love these #5: Inverted great #4: Ron just look at that lil' smile *TOP 3!* 🥉Static pretty plain but that's what makes it good 🥈Expurgation first off, i love tricky, and second, the halo looks chill af *THE NUMBER ONE ARROW SKIN IS...* 🥇OSU PLOX! what's not to like about these? looks rlly good when used with correct colors, soft on the eyes and easily readable