This certainly makes sense and will be easier to digest by ftp-master (although you'll have two packages in NEW).
For the tarballs, they are here: https://gitlab.eumetsat.int/open-source/PublicDecompWT/-/tags (click on the Download icon at the right). gitlab works well with uscan, see for example: https://codesearch.debian.net/search?q=gitlab+path%3Adebian%2Fwatch&literal=0 Paolo
