"Aren't trophies for a podium place overall in a major battle already given?"
Yes, but they're visually the same as trophies from other categories. The neatness of the trophy feature is visiting someone's profile and having this neat texture of trophies and medals to look at and know at a glance the BotBr's achievements. Making podium place trophies larger or somehow stand out above the other icons just makes sense.
I really like the idea of at least making the trophies visually larger or something for the major compo overall-placement category. Like, I've top-three'd in 5 non ohc compos, two of which had 20 or more contestants. I'll admit, I love to visit my profile every now and then just to look at my trophies and ohc medals and feel good...it's an awesome feature, but it feels a bit shallow cos I know that only five of the trophy-flurry are a noteworthy accomplishment in my brain. It would be that much cooler to have some larger trinkets to gawk at and know that relatively fewer people have them. It would also make going over to Strobe or Zan or Kulor's profiles like visiting a shrine or something.
We don't HAVE to have trophies in the first place, but we do, and they add a very tasty and fun dimension to the competition here. We don't HAVE to differentiate between the trophies by making different categories appear more visually impressive than others, but it will add an additional tasty and fun dimension to the competition here.
edit: not to swing my opinionated cack around, these are just thoughts. the whole trophy thing really is fine the way it is, but i like experimenting with new ideas. like yea, don't fix it if it aint broke, but it's fun to take things apart sometimes.