Old Bionicle parts you'd want to see brought back for Gen 2?

[One Very Agile Cat]

I keep forgetting Bionicles aren't like normal action figures, and don't follow the same rules because they're overall lighter.

[Aanchir]

It's definitely possible for a mid-size model with small feet to support its own weight, but sometimes it can make them easier to knock over or limit how many poses they can support their own weight in. And that can be perceived as a quality issue. Also, sometimes it's worth it to use larger feet just to make a model LOOK more stable and rooted — this is why you might choose to use bigger feet for a "powerhouse" character like Onua or Skull Basher than for a lighter and more agile character like Skull Slicer or Skull Warrior. I think now that sets are so much more unique than they used to be, what size feet a model needs has to be determined on a case-by-case basis.