True, but E* hasn't added anything at 61.5, nor have we heard any plans to do so. E3 has been there for ages, and E12/R1 was there when E* acquired the assets of Rainbow DBS. Since 129 isn't truly CONUS, and space was available at 61.5 that could server those who can't see 129, why not use it. After all, R1 was designed for that slot, and unless it has steerable spots it has to stay where it is. E3 is so old, there's no good reason to move it, assuming it would survive the move.
Using what's already in place at the wing slots makes sense. Adding something new doesn't.
I'm pretty sure the 129 slot itself (and for that matter 105) is truly CONUS (in terms of most people having a plausible look angle if they don't live in a giant redwood forest), it's just that because E5 wasn't designed for the slot people in the east coast are outside of the signal contours for acceptable reception with a Dish 1000.