What's even the point of adding a bunch of rules to break up a player with less than a third of the market and already in decline? It seems pretty clear that competitors have stepped it up. Meanwhile in Mobile ma bell has reassembled itself and in cable we're stuck with regional monopolies; in healthcare we're happy with the same or greater dominance by total monopolies like for insulin or glasses amongst other goods; likewise in payments with Visa and Mastercard.
Smells like political rent seeking to me.