When you say"get rid of Spectrum" do you mean Spectrum's TV offerings or Spectrums Internet offering or both? If both then how would she stream? Also my 85 year old MIL is plenty happy using YT TV with the huge savings incentivizing the switch from Comcast.Most people spend most of their time watching just a few channels anyways-once they are instructed a bit they are fine.The only reason I'm staying with Dish at the present time is the bells and whistles the H3 has-which you've stated she doesn't want a DVR.
So if she is keeping internet I would take a good look at YT TV. If no internet then yes Dish would be worth looking into.If you don't want to call I have chatted with some knowledgeable people on Dish's FB page.