It’s possible to use variables in some fields of the uploaders, and it works very well. However, sometimes I’d like to be able to evaluate the variables before uploading (in a similar way that the variables can be evaluated in the Metadata Template by holding the modifer key and clicking "Eval"). If multiple images are to be uploaded (likely to be the case for most uploads I suspect), then I would suggest just showing how the variables evaluate for the first image, that would be enough to confirm the results are as expected before starting the upload.
Please consider adding the capability to evaluate variables in the uploaders to a future PM and PM+ version.
