the challenges are always being updated
you can report anything that needs updated as a bug:
Thank you for helping make FCC better. Bugs can be reported as GitHub Issues. Whenever reporting a bug, please check first that there isn’t already an issue for it and provide as much detail as possible.
Free Code Camp is an open source project, so you can also contribute yourself. For anything about contributing you can read the contributing guidelines
The lessons will also change format in the near future (but not the projects, those will stay the same), the curriculum will change to teaching in a project based format and introduce new certificates: