Select Choice Unlimited vs Magenta Unlimited 55

I recently looked into switching to a Magenta Plan as this would increase my trade in value from $400 t $800, an additional $400. I have one line. I was told that my cost would increase by $14/month. The only real thing I'd get out of this is an increase to my hotspot limit. I don't use it that often. So… an increase of $336 over 2 years (contract when buying a new phone) and I save $400. Big difference is, I also lose the grandfathered plan and $14/month every month. 

Seems like TM is trying their best to move people over to more expensive plans.