Not sure on the weight. It really depends what you are going to do with it. Weight is a good bad issue. Too light and it will not be very good or at least extremely limited. Plus the length is another huge factor. I have not used these small hatchets yet. But my take is this, at just over 10" a hatchet that weights 11oz i going to have an extremely limited application or at least it would seem. I could be completely wrong on this. But, even one that weights 2x that, at that length it will only be useable for somethings. But more weight in the head will make things easier...chopping and hammering, pounding...etc. I could be off but I would soon carry a bigger knife. 7"+. More uses. I think it would be far more versatile. I would be curious how an A2 vs Mini hatch for chopping would compare even an A1 Fallkniven. This is Apples to oranges but batoning is like splitting, chopping is chopping....so the uses do overlap and can be achieved by both without much sacrifice.
You seem like weight is a big factor. I just think at such a small size for a hatch and light weight you amount of practical use is very low. I could be off because my camping axe is 19" and it is pretty good for a lot of stuff but once again limited so I still carry an A1 and a folding saw (Bahco). To be honest I could skip the Axe on many of my trips. I have taken a Sven Saw and my A1 and never missed the weight and the limited use of the axe but the 19" is capable of a lot. If every oz counts I would re-evaluate the Hatchet. It size and weight limit its use compared to something else that you could carry that could do a very similar task. Just my $0.02, I might be off so feel free to make change. HA