This is a solution that should be satisfactory, but I don't see how it could be called "goodwill".
Leica have already demonstrated that the entire digital line before the M240 was simply customer beta-testing. The fact that people were being charged for sensor replacement in the past even while a mountain of growing evidence over a very long time was showing an unusually high defect rate/attrition rate does not sound like "goodwill" to me. To be fair, there were also many stories of sensors on out-of-warranty bodies that were replaced for free, but this exchange, which was often cited as proof of goodwill, was actually simply the minimum that the company should have done.
The terms of the current solution proposed by Leica are vague. What constitutes an "attractive" upgrade option? Is a "permanent solution" to the M9 sensor problem even possible?
I suspect that neither of these will pan out. And the amount of time required for replacement service, which has been an issue in the past, is left simply unaddressed.
My admiration for Leica's ability to propose an entirely vague solution that satisfactorily restores brand image far surpasses my estimation of the "goodwill", not to mention reliability, of the brand.