If you take this to it's ultimate conclusion, how does any class get spells/abilities in the game?
Where ever that definition is spelled out, all they have to do is check mark or select Warlock and define at what level. There is no technical reason this isn't implemented. It is 100% a decision that Larian has made, for whatever illogical reason.
And this decision being so, so illogical, I would almost bet that it won't be like this in Release but it's obvious how this should work and such an easy fix.
I think the game has different spell lists for every class...there can be spells on multiple lists but they are still separate lists. And the reason they can't just go add Warlock tick next to all the cantrips is because then all the catrips would be available to all warlocks when they hit that level...including non Pact of the Tome warlocks and allowing warlocks to take more than 3 cantrips they normally couldn't have, etc. It's supposed to be a strictly one time access to the cantrip lists of other classes just for Pact of the Tome. That's why it's not that simple.
