Lots of people here compare Minfilia to an accountant.

Except that's Tataru's role. And she's pretty good at it. And while she wouldn't be able to defeat a ladybug in combat, she gets plenty of points for trying.

Sure I wouldn't outright kill Minfilia as she isn't a mass murdering psychopath, but I wouldn't go out of my way to bring her back now that she is gone.
I don't like that we lost Ysayle and Estinien but with Alphinaud, Tataru, Urianger, Y'shtola, Matoya, Cid, Alisae, Yugiri. and soon Krile we have more than enough genuinely useful Scions. The rest cant stay where they are.