Sounds like you're jumping the gun to me. I wouldn't say you've tried to work with it with a mere 200 rounds downrange? Is this the first actual pistol you've fired? Sorry if the question seems intrusive, but willing to trade an otherwise well known pistol design makes me wonder. You see-to me, a mere 200 rounds through a pistol doesn't automatically rule it out as working for the user---it's a give and take situation until one knows for sure, and to think you may have wasted 150 rounds.
I have a Sig P220 ST and it seems to be a great gun. I have only put about 200 rounds through it and it seems to be off down and left, but I think its just a sighting problem