It seems to me that the purpose of a leader ability is to have something to build your deck around, so that you can use your skill to make synergies between your deck and its leader. Enter Lockdown where the opponent can do that because they know they're running Lockdown but yours is negated leading to a disadvantage before you even play a card. Effectively the only way to counter it is to run NG decks that either have Lockdown or have Damien de La Tour (plus some way to protect him so he can use his order).
Enter Anna Henrietta. Not a leader ability but a unit that lets you effectively have 2 different leader abilities. Can also be combined with Lockdown as she steals the other person's ability allowing for preventing the other person from using their leader ability and then stealing it and using it (twice if combined with Damien de La Tour).
This means that if you want to have any hope of winning playing against someone with Anna Henrietta in their deck you basically have to play Lockdown or figure out how to build a deck that's not vulnerable to your own leader ability.
Edit: I forgot to add how stupid it is that it's a Deploy ability and there's no way to counter it. I don't even want to know what happens when you combine it with Syanna.
Enter Anna Henrietta. Not a leader ability but a unit that lets you effectively have 2 different leader abilities. Can also be combined with Lockdown as she steals the other person's ability allowing for preventing the other person from using their leader ability and then stealing it and using it (twice if combined with Damien de La Tour).
This means that if you want to have any hope of winning playing against someone with Anna Henrietta in their deck you basically have to play Lockdown or figure out how to build a deck that's not vulnerable to your own leader ability.
Edit: I forgot to add how stupid it is that it's a Deploy ability and there's no way to counter it. I don't even want to know what happens when you combine it with Syanna.