Surprised to see Sorlock that far down, it's basically Warlock, but better. You do lose a single spell level and a third invocation, but the additional damage potential is insane. You also get more flexibility through your sorcerer spells (including feather fall as a ritual), making it very worth it.
I asleep didn't know you could stack extra attack with deepened pact (you can't in regular D&D 5e), seems pretty bonkers as well. Might try that on my next playthrough.
I am! I'm doing a monk and plan to multi class into rogue a few levels. Still very early in the game. Playing it little by little. I also made the same character in multiplayer with a friend so we had to start that from the beginning.