To keep it wireless, you need to increase the 100. I have the same situation, but my fiber provides 350. My TV a similar distance away shows 180, a significant drop-off but more than adequate for seamless 4k reception.
I got Dish in 2005, and it was really great at that time. I loved the VOOM channels and still have a number of recordings, and when I play them it's obvious that back then, Dish provided a better PQ.
It seems to me that as Dish moves more channels to streaming, they're kind of making the case for Dish subscribers to abandon the service and move entirely to streaming.
I seem to recall the guide info for streaming channels going out to the same length as regular channels. Now, the streaming channel guide info goes out for only around two days. I suppose that's another "improvement" from one of the software updates.