Rules to me are, fundamentally, mental toys--the reason for each existing is that both create a different gameplay experience on the table and in char-building. They're there to also inspire players to create an in-fiction construct of themes and aesthetic they're into, but that's a secondary concern. I'm very much not a fiction first kinda guy, and certainly not someone that finds verisimilitude anything but a nice bonus AT BEST.
And the rules for Pact Magic and Invocation doesn't have enough ties to the fiction itself for me to even say that there'd be a conflict--Treating invocations as just the player upgrading their Arcane-Engine Ensemble doesn't seem at all conflicting with the mechanics, with only the CHA keystat focus being the only 'big' hurdle.
But then again, INT is a weaker stat so balance-wise if they're fine making changing the keystat to CHA it's still a-okay in my table.
Thank you for accepting my denigration of something you held dearly and clearly care for. I am not being sarcastic despite your clear sarcam and I am not being apologetic for my rudeness earlier, it was deliberate.