Personally, I absolutely hate that idea. I don't know who you are, the person who made that decision, but what were you thinking?
A standard gaming table it 182cm by 120cm. That leaves you with a 15-cm wide strip of space for your cards (on both sides). With American mini cards you were able to neatly place your cards in 2 rows, clearly visible, along your ship cards. Even with that, in a 400 points game, if your fleet had multiple ships, upgrades, and 8 aces (good old Sloane, Rieekan or Dodonna), you started to get close to running out of space.
But with this? Can you imagine running a fully-kitted Starhawk? Or an SSD? Or running a 500+ points game? You can't even do what you could in X-Wing (slide cards halfway under each other) because the cards are vertical and all the text is in the middle! Many (if not most) X-Wing players in my city just stopped bothering with upgrade cards, and instead just bring printed A4 sheets... and X-Wing takes half the space Armada does... do we want that for Armada? I don't.
And the wasted space! There is so much wasted space. Ackbar and Commander Leia are definitely way up there when it comes to amount of words on a single card, and yet almost half of the text box is empty. Why? The letters also seem only marginally larger than on American Mini cards, so what is the point?
I understood prize cards being standard-sized. I didn't like it, but it was alright - rare, few fancy cards (I especially like my 1st place Profundity), though a dozen ended up merely posted up on my wall. But standard everything...? No. That's just inconvenient.
And before you say - "ship cards are getting smaller" - yes, but you only have a few on the table, as opposed to a 20 or more upgrades, and you save only half a centimeter per card, while Standard are almost 2cm wider than Mini, and you will have to place them in one row instead of two.
Edited by Petersabertypos and thoughts