So wait until then to switch. You won't need NFL Red Zone in February. I bet eventually more channels could be added to YTTV. Also, don't make the switch just based on Cobra Kai. If you want to watch that show, sign up for a free month trial of Youtube Premium and watch the whole series in that time.
I switched from Playstation Vue to Youtube TV a week ago and have been very happy so far. We did lose a couple key channels but what can you do?