Right click on the server icon or header, then per-server profile. Completely reasonable to me, and I don't think it has ever not been there since they introduced it.

Shop is where they sell customization stuff.

Quests let you earn currency you can use to buy customization stuff or nitro instead of real money.

I don't think there's a significantly better way to do whatever they are doing, and I don't see anything particularly objectionable about any of it.

Nitro is a subscription that gives you more customization for your profile (banners, themes, etc).

Shop is where you can buy additional customizations.

Quests get you exclusive unlocks for various games.