Yes. The queen is really powerful. In the fairytale land she has a country, she has soldiers, she has magics, she has information and as of now in the fairytale land she seems to have everyone believing that Snow is a traitor and a murderer. I think that is going to change eventually and the people will be on Snow’s side. We have already seen a bit of that with Charming helping Abigail and Frederick. And we know that in the future Snow goes to Cinderella’s wedding and that they are having a war counsel in Charming’s castle, so they will get there and the queen will lose some of that power.
She still has magic and information though and soldiers even at the time of the curse. And in Storybrooke she pretty much is the absolute ruler of everyone. That is also going to change. We saw Gold using the please against her and we saw Emma starting to believe that she can play against her and Gold telling Emma that she is more powerful then she thinks. So i say yes that the Queen has power, but that she is going to lose it. Though maybe not her magics.