Is it me or everyone in 1 vs 1 uses Little Mac or semi naked ZSS? I stopped using Little Max in for glory after seeing how many Mac dittos I found.
It's not just you. Quite a few people have been doing this from what I've seen. Personally, I've really enjoyed using Lucario and Shulk in 1v1 For Glory just due to how flexible their playstyles are.
Since you don't really know who your opponent will use in 1v1 until the match starts, I feel like the characters used most in For Glory are either very flexible or simply have multiple good kill moves. If you can DI really well, Lucario is an absolute beast. I played a pretty solid ZSS player earlier today and 2 stocked her just because I was able to live to 175% (DI'd at least two moves that probably should have killed me) and get a few solid hits in. Forward Smash offscreened ZSS at 91% after I reached about 120%, and then Double Team took her 2nd stock at around 80% after I hit 175%. Also, keeping a fully charged Aura Sphere in your hip pocket can be really nice to stop a lot of ground combo finishers from happening.
As for Shulk, he's hella fun to use. I find myself using Buster, Speed, and Smash Monado Powers the most with him. I've probably said this before, but his counter move (Vision) is absolutely devastating. Was playing a solid Lucina player earlier who seemed really heavy on edgeguarding. Threw me off the stage at 80% and as I jumped back toward the stage, I just used Shulk's Vision to counter the edgeguard forward smash. Not only does the move get me back on the stage, but it KOes Lucina off the top of the screen at 82% with no Monado Power activated (Speed had just gone out before the grab, so I didn't have time to get Smash activated) So yeah, you definitely want to make sure your edgeguard move will work vs. Shulk. Otherwise, you may get countered in more ways than one.