That explains A LOT.
The pixie familiar is the best rogue companion in the game if you are a caster. Tomi and Dorna simply do not know how to do their jobs (Dorna, you are a f... cleric, use find traps!!!"). There are several hackpacks that address this issue, but the henchman´s AI is very messy. The game itself forces you to pick some levels of rogue in every build in SP to avoid frustration.
I personally prefer the summon undead and the animal companions and familiars instead of the henchmen (You do not really miss very much there besides in hotu and Daggerford). And trust me, for me it is a very BIG deal that I am tempted to forfeit a companion in an rpg game. I even finished Numenera with Rin and P:K with Tristian

Yeah, I am that big of a "M".
In most PW they avoid traps and locks, luckily. The rogues had very bad press because you always had to wait for them in MP: Wait for them to run in sneak, wait for them to craft their traps, wait for them to disarm the traps... And eventually they are going to multiclass to Weapon Master, like everybody, so...
Keep in mind, I don't have a dog in this fight, My view on both NWN games is the toolset/API provided is what determines the best. Most SP stories are 'meh' at best for me
ED: If we compare toolsets, I think that NWN takes the cake (maybe the only plus the game has, the toolset and the mp). NWN2 Aurora toolset has some "inutilities" so hardcoded and so much headache-inducing workarounds to make that you may think Obsidian has stocks on pharmaceutical companies. If you compare that with the NWN toolset, or even the DoS2 (not the Dos1) toolset, the one that allows you to make quick fixes with the notepad if you misstep...