In my experience, some wobble in the scissors pivot when the scissors are wide open is normal. It should be fairly tight when the scissors are in the closed position though.
The real question is, how do they cut? If they cut well, then you probably don't have a problem, and I wouldn't mess with them. FWIW, SAK scissors are some of the best out there, and should deliver clean, straight, easy cuts, outperforming virtually any other scissors in their size range.
If the scissors do not cut well, AW has laid out a nice troubleshooting guide in the previous post.