I've yet to hear of these 'features' though tbh.
Guess we will see, the HTC One Google Edition has already been spotted running it. We should be able to tell if there is anything of real merit when it is released officially.
I'm sure KLP will be the bigger deal, but then 'how much of a bigger deal' will remain another big question.
We're getting to the point where it is more google 'services' and under the hood enhancements rather than dramatic shifts in the OS. Given then we have to factor manufacturers skins on top, those under the hood evolutions tend to be even harder to appreciate .....
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It really depends on what it brings.
If it brings nothing major and many of its enhancements are already being substituted by Sense 5 / HTC software, then indeed there may not be a genuine need to focus software development on 4.3
If that is the case then personally I'd rather they take their manpower / human resources and focus on bringing out Sense 5.1 on top of KLP for release towards Q4.
If anything 4.2.2 update has shown the additions to the OS that matter (over 4.1.2) were not Google OS updates, but the new revisions and additions to Sense 5 HTC added with this update.