My swisstool does not seem to have any, significant/noticeable bladeplay; do you have up and down or side to side play? Mine of course is a safe queen.... or king..
I assume some up and down play could be possible, the locks are not really heavy duty (neither are the locks on other multitools I have), more designed as a safety feature, rather than to allow stabbing things, just like in most Swiss army knives.
All I can think is that since the swisstool is a heavier use /abuse tool maybe if used a lot, heavily, it will be more likely to develop play; I don’t have a spirit to compare, so I am just guessing here...