I'm sure I already know the answer to this, but will Mystical Disregard also negate the domination points of the card it covers? I believe the intent is that it would, but the upgrade only talks about the effect.

I would agree as with you as well. Why the old card is not removed I dunno, unless its so that effects that key off a card being *played* will still take effect or some similar subtle wording.

My only issue remaining is if the card covered has any cost to it, does that cost no longer exist for the purpose of domination? I believe the intent is that the card will be gone entirely, therefore removing the cost. I just want confirmation about that.