Well, two things. First of all, we know that changing things in MCU time travel isn't like back to the future, it creates a branch. So Loki, crashing and cracking the floor, and talking to OB in the past changing his memory in the future, and Möbius writing skin in the dust and showing up in the future.... Are all back to the future time travel. So TVA Time.. doesn't branch. Loki is time slipping in one specific time line.
Number 2. What does OB mean casually saying he wrote the handbook for the TVA? Is he....A kang? Is there gonna be some sort of reveal here? Not only do I feel he is a kang... He feels like an extremely important one. One that he who remains is willing to keep away in the basement. Is he a good dude? I dunno... But I am intrigued.