Look at what you're reading as the thoughts going through the mind of a potential purchaser standing in front of the display in the store or that of an online shopper. These are the objections your item will face without you there to overcome them. The design in and of itself will be the thing to tell the story and set the mind racing with the possibilities of how it will make the user better, faster, more comfortable, less fatigued or frustrated and, all that for the price of...
When I first started I used the square basswood poles. As I developed as a climber I used pole saws less but still have them as a tool to use where it's strengths outweigh its disadvantages. For the most part that application is in a wide open canopy not a tight one. That is how the use of any tool is assessed.
How you've shown the tool in use has raised objections. The idea of the tool itself isn't flawed but the features shown don't equate to an advantage and therefore no benefit. Feature, Advantage, Benefit. FAB = sale. If we add Disadvantage (D) it will equate to no sale.
An example:
F: ergonomic grip
A: positive hold less likely to lose one's grip, designed to fit the hand ergonomically
B: reduced fatigue, lower potential for accidental injuries.
Looking at the current design and how it's proposed to be used:
F: lanyard attachment
A: secure place to store the pole saw.
D: blade dangling well below and potentially out of sight. potential to snag climb line, pole saw hook catching on limbs while trying to retrieve the polesaw.
B: none as the the Disadvantages outweigh the advantages.
Simple exercise. Once you've gone through the different designs, mock them up and try them out. See which ones really do benefit the user and overcome some of the shortcomings identified. No tool is absolute but some have become so fundamental to our jobs as to leave us wondering at how we got along without it. Others have ended up filed as curiosities.