This is pretty common knowledge, but like you said it's for newcomers.
It's probably a better idea just to improve your own building, however. Whether you go for making cool looking bots or making killing machines there is much more satisfaction to making your own robot than using someone else's.
That said it is a good idea to tell the new people that importing other peoples bots and seeing how they're built is a good way to improve. Just don't copy the bot exactly, people don't like having their work stolen