Two quick observations:
- Getting standards passed is hard (especially for popularly used standards), but can be supported by latent usage in the community. You can create a plugin for a few languages that automatically allows the timestamps and doesn't require commas. Get a bunch of people using it, and you'll be on your way to actually getting it in the standard in the future (still debatable in this specific example, but broadly, usage never hurts for getting something into a standard)
- If your concern is your own frustrations (rather than benefits of the vast majority of people) - I highly recommend a simple editor-level mapping that translates from your preferred DSL to the underlying standard