What a few people seem to have missed is that this update regarding seal twisting isn’t a Change it is actually finally a much anticipated and long awaited Fix… the reality is seals have been Extremely bugged for the entirety of classic, purely due to the way that the spell priority/artificial batching system was implemented.
Read more here:
https://us.forums.blizzard.com/en/wow/t/spell-batching-vs-seal-of-command-bugged-interaction/492921
Tl/dr the way seals are functioning due to the artificial batching system is bugged and combinations such as SoR / SoC twisting are broken because of it.
Seal Twisting should indisputably be in game and unfortunately has been majorly broken up until this new PTR fix.
Moving forward into tbc this will actually prove to be a great fix to the paladin class with SoC on SoC twisting reimplemented, specifically to the alliance, it will mean that should blizzard choose to not add seal of blood to both factions then alliance will actually have a not as good, but at least remotely competitive option (without which alliance would have literally nothing), which will assist in reducing the horde faction imbalance which is innate to tbc.
All in all I’d just like to say thank you to blizzard for finally fixing a bug which has plagued paladins for the entirety of classic, and for providing a measure for enhancing faction balance moving into tbc.