I haven't had a chance to Packraft much but I've used all the paddles mentioned a ton.
I think Dave's advice is spot on, I'm a huge Werner fan
The Werner bent shafts are really nice, although a straight shaft can do everything a bent shaft can do and I also agree I can't remember seeing a Werner 4 piece bent shaft. Bent shafts are usually 2-3 ounces heavier. Lendal makes some really nice, light 4 piece bent shafts if your committed to that route.
The Cyprus is a really, really nice paddle. It has a foam core blade which adds a ton of buoyancy. This advantage, however, is most striking for braces, rolling, and a few other sea kayak maneuvering strokes. For me, these advantages would be mostly lost on a dedicated packrafting paddle.
Werner also makes a Carbon Shuna as opposed the 'glass Shuna with the principle advantage here being a 1-2 oz weight savings. The swing weight on this paddle is really nice for long tours, but for a packraft paddle, necessary for the cost....eh, probably not in my calculation. If you do go with the carbon, yes, you are sacrificing some rock banging durability. Not a problem for lakes (but I'm w/ you on trying to make a treking pole superlight paddle for these instances) but not ideal for bony river running. The glass paddles really are very durable and the increase in stiffness over a generic nylon blade is worth it in almost every circumstance. Werner's whitewater paddles are awesome, but much heavier than the touring line and more specialized than required for many excursions.
Aquabound has mostly fixed the carbon MR breakage issues from years past (I once had 3 paddles break in a class I was teaching.) Avoid flexing the shaft (launches, shoves, and kayak reentrys) and you have yourself a good all-around paddle.