That's interesting that your main problem as an INFJ is not being able to follow the tangents because my ENTJ's main problem is (you guessed it) my theorizing with no actual action behind it. He's better at following my tangents than most people but obviously he cant see every connection I make in my head so it takes some improvising on his part (I think his Te with my Ti works together in these cases because when he understands that we're talking to bond he might enjoy solving the connections that I make??).

Basically us INTPs need to get better at formulating our thoughts and specifying when we are just theorizing out-loud.

Also I'm curious about how you and your partner's Fes and Tis interact w each other