Mage Hand being 1/day makes the Arcane Trickster's magic legerdemain features a LOT less useful. It's kind of awful.
I still use arcane trickster and eldritch knight on Astarion and Laezel mainly to get the shield reactions. Not sure if they reach level 3 spells for counterspell later on those subclasses.
Also bladeward & truestrike are nice to have.
I just checked on the wiki and both those classes are limited to 4x level 1 and 3x level 2 spells which is a shame, no counterspell. For level 2 spells will likely just be blur and mirror image.