There isn't enough champions/origins/classes to build.

We can say all we like about the state of balance between the classes/origins, but however equal they are or aren't there simply isn't enough of them. Even if they were all 100% equally viable, there's just too few.

If you find the right threads about regular LoL, you'll see me saying that I think Riot should stop making new champions, and have all the people who would be making them help with balancing and reworking old champions until they're all sorted before making more, since there's already so many anyway.

In TFT it's the opposite. There's so few options that they really need to prioritize making more first.

I do have some ideas, but I suppose that's best left to "Concepts and Creations" threads.