It's not if you do the math, on a 6 on 2 off you will have only the min days off. Then a 2 weeks off.
If you take your days off per month plus your leave. You will have more days off totals.
This is a been counter trick and the company who offer that win in productivity this is why they do it.
Vietnam have try 5/3 and even 4/4 with less pay. To my knowledge they don't offer it anymore.
A real commuting would be like KAL