The tools are a valid sidegrade from the overmelded aesthete's tools as is (Except for the fishing pole which is straight up better in every regard), so I don't think they need to be improved further.

Their main selling point is that they mostly demand your time as opposed to money.

We're also apparently still getting more new tools in 5.5, so it's possible those may be more optimized then the skybuilder's tools (Which tend to overbudget on gathering/craftsmanship).