Old katas tend to have skewed difficulties

Mathematically, it the same, but sometimes, we lose sense with over-refactoring.

Yeah could have simplified even more like that, to me kata 7 you could make it straightforward and easy to read. If you interested on golf solution, yes, we could use this or even better came out with an equation for the number lines.

Anyways, thanks for the note, Hope keep it here for future reference.

This is the specification decided by the author, though it is not best practice and has not been corrected accordingly during beta phase, hence it is too late to enforce such changes since it will invalidate all solutions in 20++ languages

is genius bro

It kind of is, it's considered bad practice but you can break lines using a ; in python.

It's ugly as sin though.

They must have been style choices or something. I liked the way the < 1 and < 2 lined up, and I wanted to look cool using more recursion

That is impossible. Kata levels don't change.

It is very difficult to update kata ranks, especially kata with many many solves (due to server load). So usually it is not possible. In some rare cases, kata with only a few solves can be re-ranked, or kata with many problems might be simply retired, however in general it doesn't happen. Just enjoy the easy points :)

This kata is too old. It is from 2013. This is normal. Back then, these questions were 5kyu.