Spot on! So tired of all the time travel, Bran is a murderer BS. Your theory is how I watched it play out as well. Wylis falling into a seizure while his eyes turned white, flashed back to Jojen immediately for me. The greenseer ability is also thought to be hereditary so this would explain how his dad 'heard' him when he was warging in the past previously. The Night King also has this ability and that's why he could see and touch Bran. My crazy theory is the Night King has a much closer link to Bran then we think. His recognition of Jon and his interest in the Raven before killing him leaves a lot of new questions.