Along that line of thinking, for a long time I've been thinking about CS's "light" version of their Gurkha kukri. Like a machete, it's only 1/8" thick spine, so it isn't all that heavy. Like a kukri, it's got that belly to enhance chopping ability.
So, guessing based on the geometry, the plusses and minusses:
+ light, like a machete, and easy to swing for brush clearing and 1/8" thickness guarantees good performance in brush.
- will still wedge if you try to do hard chopping, due to thin 1/8" profile. So it's still not a hard chopper.
+ BUT, if most of your chopping is de-limbing, then the kukri shape should increase the diameter of limb you can sever with one cut.
So, what I'm saying is, you get machete properties, but also increase the size of limb you can cut off with just one cut. That is a very important property -- remember the machete will often wedge if it does not make it through with a single cut, so increasing the single-cut diameter is important.
Anyway, it seems like no one talks about the Gurkha light, because it's too light for kukri fans, but too weird-looking for machete fans. Maybe this *is* a case of best-of-both-worlds, though...
Joe