There is no such thing as an SC2 account. There is a battle.net account, for all blizzard games.

I had most of their library. I had a month before bought the new hearthstone expansion, and was an almost daily hearthstone player.

I deleted my account. The statement is no more doing business with blizzard based on their behaviour, and not even allowing the possibility by deleting the account which costs me something to do.

I'm not really sure continuing to play their game with a different tag counts as anything other than you fooling yourself into continuing to deal with a reprehensible organization against your best interest, in exchange for a video game.