It's a matter of price: I would assume that the soft-spline motors would need replacement, find out how much the replacement costs, look at the cost of the time I'm sans car as well, and then see if I get enough of a discount on that Karma (vs some other Karma without those problems).
As mentioned - "Yes" assuming the price is right. My car has unfortunately had battery modules and RDM issues all under 4K mi, some partially covered under the owner warranty. If you can get the car at a good price just factor in a $10k worst case. I think all the issues can be easily addressed and it all depends on your financial and time tolerance of having the work done when/if something nasty happens (I think I have had all the worst).
According to KarmaNew... see the Karma Automotive forum, Karma Auto recommends the soft-splines be replace and the RDM be repaired. I have had two RDMs in my Karma since new -- one under the initial warranty, the second I bought and had modified (something to do with a retainer, pinion movement and seals). The second is working fine, and I will have the RDM that was removed modified and keep as a (hopefully unnecessary) spare. The motor splines were inspected and found no to little wear. However, the hardened splines were not available at the time, so the CSP followed the recommended procedure at the time -- that was to reverse the two motors, and loctite the splines together. I understood that no one had seen a failure with that procedure. Fingers crossed.
Yes. We should think of it like insurance. We all pledge a moderate amount of money, to support the cars that die knowing that ours will be fixed if we lose the lottery. I was thinking of proposing an "informal" such idea among my local group of Karma owners when The New Fisker showed up and made sure people could use their CSP funds. I'd rather spend $1000 with 10 fellow owners to know I'd never have to spend $10,000!