Honestly, Smash is BOTH a celebration of Nintendo All-Stars AND of Gaming History. Piranha Plant, Byleth, Min Min, Pyra and Mythra are basically reminders of how Smash even started: all first-parties. Yeah, 1/5 of the roster is all third-party right now, but it's best to keep in mind that Nintendo still has a metric ton of characters themselves to pull from, and they can't always pull from other companies to add to the roster. Yeah, people including myself want the likes of Doom Slayer or Reimu or [INSERT MOST WANTED 3RD PARTY HERE] in the game, but ultimately it's all what Nintendo wants to do with it, and they wanted to add the mentioned first parties for some of the DLC. We can request and want characters, and that has paid off in the past with Ridley, K. Rool and Banjo. But Nintendo can't always abide by our requests. They're gonna add who they feel is worth adding to the roster, and if they added them because we've been requesting it, boom, both parties are happy. At the end of the day, it's best that we never forget Smash's roots and how it started in the first place.