I don't have carpal tunnel but I have always liked drag bars (like the ones you show). Had um on a Triumph Bonneville back in the 70s and had um on my previous bike (a Harley Street Bob). I plan to put um on my current Nomad eventually.
You can also get TBars which is a drag bar with the riser built into the bars, but sometimes those don't quite have the needed up/down rotation angle (not pullback angle). With risers and dragbar you can rotate the dragbar to just where you want it.
Now admittedly if you don't have long arms, you are gonna need some risers with pullback. Also the Kawa hydraulic controls take up a bit more bar length than Harleys so make sure you get enough bar from end to bend.
Also you get more selection of risers (and better prices) from the ones made for Harleys, which have 1/2" riser threads. So you would have to replace the riser bolts on your kawa to match. With the older models I believe they had to drill out the tree a tad. With the 1700s (from what I've checked on) I think they are actually a tad more than 1/2" dia OEM and might have to wrap the 1/2" bolts with some stainless steel shim tape, not sure haven't done it yet.
I would recommend replacing your riser bolts with Grade 8 bolts anyhow (unless you have Grade 8 in um already). Riser bolts have broken, maybe because of over torquing, or whatever. I like grade 8 riser bolts.
These are some nice drag bars at a good price.
Also some ZBars come with a more straight hand angle like you want, you could search on those. You could use your OEM risers with those and just rotate the bars for pullback angle.
Anyhow just some ideas your way, hope it helps.