Based on the SHVERA, the only people who should be losing their distant nets(SD and HD) are people who's distant nets allow them to watch network programming BEFORE their locals actually show it. For example, people on the west coast, with east coast distant nets, can watch network programming before their local affiliates show it. This does not apply to Central with east coast distants because the shows are still shown at the same time. Other than that, SHVERA has nothing to do with why Directv is doing this.
Some have speculated that Directv is doing this to try to protect their Sunday Ticket Superfan package, so some people won't get so many games in HD for "free". Meanwhile, Directv is using SHVERA as a smokescreen, so it looks like they are not to blame. It wouldn't suprise me that Directv to stoop to this, as they seem to be looking for all ways to squeeze more $ out of their customers these days(reminds me of why I left cable).