Why does the author of that article believe the gun won't be a great carry gun? The SIG P220 is great in a good leather holster! I'm looking forward to seeing this new model.
The flush fit magazines will hold 10 rounds. If I were to buy one, I'd carry it with a 10 round magazine in the gun and two spare 14 round magazines.
However, I will not buy this gun for at least a year or two after it comes out. I want to make sure there are no bugs in the frame or magazine. I'll have my standard P220 until then.