I really want dual Daggers to be more useful for Rogue, it's a more iconic type of weapons for the archetype.
Dual wielding Rapiers just feels really weird to me.
I think that Rapiers thematically works well with Arcane Tricksters for example as a one-hand Rapier and the other hand free for spells, but with Rogue it just feels strange.
I wish Larian would buff Daggers or something, otherwise I hope modders will fix it.

I don't really care about realism etc, I like historical armor, weapons etc and do read a lot about it but in games I don't really like it unless it's a simulator ( also realism ≠ good game design ).