I played with DIAMOND-MEGAN pipeline and it appears to be informative, plus it provides an additional lca algorithm, have you tried that?

I used it a lot in the past, but it's complicated in a pipeline. There's a tool called Malt from the same people that does both but I've gotten the impression that it's not maintained. But I think #C031QH57DSS uses this.

well let me know if you are interested, I might consider it for my use case. the changes are: diamond in daa format + daa-meganizer + daa2info, the only difference is that daa2info does not export e-values but the other three columns are included.

If you're interested in adding it, go ahead. There is a number of translation files to handle too which is sometimes time consuming. This would also add alternative functional annotations.