Questions about UV scale

[tyFlow]

That's an interesting request...currently there's no way to access and modify existing mesh UVWs like that. The UVWs that are modifiable by the Mapping/Script/etc operators are the single-value per-particle overrides. Perhaps something I can add in the future, though....although it does have somewhat limited usage, since it would only really work on box/sphere/etc projected UVWs...still, I could see it being a useful feature.