The Category List:
These categories should be added, so you could search trough stuff more easily:
Every type of map (survival/adventure/puzzle/ctm/parkour...)
* Countdown in chat - whenever you advertise, there should be a countdown when you can advertise again, so you don't get banned for accidentaly advertising too fast (happened to me) :D
* More xp for diamonds - There isn't a lot of point to give a diamond to someone, if they can earn xp so fast with advertising and getting views. Thats why a lot of people who make bad skins get a high level
* Video page - A place where you can share your videos, but this may possibly not work, so it's just a suggestion.
* A New Subscribe message - A subscriber message should be added, so a little icon pops up when you earn a new one, a icon that doesn't bother those who gain tons of subscribers every day
* A skin creating app - Maybe a app should be made or taken from somewhere and added here, that helps you make skins.
* Abbility to name your class when you reach a big level
* A Specialist Favorite award - a chance for noticable builders, and the contest judges to give you a special award as their favourite.
* A rule for not spamming new projects - Some people like to spam 30 creations of random 5x5 builds, that mess up the project section
* A feature badge you can showcase to others - So you could show off your best badge, so you could showoff to others.
And the last one: A medicine, that helps you get off of pmc when you should go to sleep, but you stay up all night to write suggestions xD

Diamond if you want any of these suggestions to get added!