could we have a filter like in Krowi's Achievement Filter to filter by selected expansion versions? for example as a completionist im only currently interested in pre cata content and seeing anything else is a spoiler for me

thanks, this is solved with

Added /att awp expansion, which generates a window with all added things for every patch of the expansion.
Supported expansion shortcuts are: classic, tbc, wotlk, cata, mop, wod, legion, bfa, sl, df, tww

For the sake of documentation, feature was added in commit 9004666