So ignoring the Fortress question for a moment, how much stronger is it to be able to also gain
more?
When you trash a Copper with it... no difference, unless it happens to be a Poor House game.
When you trash Estates with it... So you can gain/play a
instead of having to gain/play a
. I actually feel like this is a pretty big buff. Often the
s are stronger than the
s anyway, and not every game has a
available. Or you could be forced to gain a
Potion that you don't want. The other way, you can at least always get a
Silver, though you lose out on the free action play.
When you trash your Silver, or any other
, it doesn't matter much, you want that
. And that will probably be a common use of this card.
When you trash a
is probably when it makes the most difference, but you don't really want to trash your
s very often. Though you'd still often be happy to to get a
that's played immediately.
Looking at all that, it sounds like "Exactly
more" might be on the weak side actually. When trashing your Estates or any
s you picked up, it's a big limitation.