It's pretty hard to use a custom floating point representation that isn't supported as a primitive type. To make the matters worse even the standard binary floating point number doesn't map to JSON. E.g. +/- Inf and NaN don't have JSON representation.
We strive hard to provide intuitive user experience and abstract away the complexity of modern computing for non-technical users. At some point we might use a decimal floating point or better yet a fixed point decimal as the default representation for numbers.
Having the team to focus on their work w/o email distractions is a dream of productivity. Having a custom tool is key to getting this kind of thing to work. Airtable(https://airtable.com/invite/ijciBkzn) we posted yesterday on Show HN was built to get that set up easily.