Having rewards for top 100 would help ranked immensely, the same way that having more rewards behind commendation crystals (Diam+) would help immensely, and the same way that having rewards accessible from as soon as bronze would help lower ranks as well. Ranked is in dire need of all of those.
What we don't need and what was a mistake was adding the fomo on top of it like older feast rewards, meaning limited in time. It's like suddenly rewarding the first 10 teams clearing an ultimate with something unique, it's what is making people annoyed.
I get the idea behind having a trophy like in sports competitions though, but that doesn't sit well with stuff like armor and mounts. The fomo trophies I actually don't mind when they stay specific titles (like CCRC champion and similar that we already have), or even the old unique trophies you could get as furniture for your house.