Those are both great ideas.
We can certainly suggest to YC companies that they adopt side-project-friendly legal in their terms of agreement. Whether they choose to do so is entirely up to them, but it's worth bringing to their attention.
On international remote: for our Work at a Startup onboarding, we do ask your location and whether you're looking for remote roles. But I think you're right that we can go further by trying to help founders lower the bar to working with overseas engineers -- standard legal is a good starting point.
Thanks for these ideas, and I'll post with updates as I have them/if I get blocked, as maybe others here have experience in doing so successfully & smoothly.