I had a short circuit on my beloved sx2 and had to upgrade to an sx3. And I start to regret this too...
I fully agree on the feel of the jog wheels are way too sensitive (and unreliable) when performing a back spin. (in long or very long mode)
While the SX2 in regards on Jog wheel feel was spot on, the SX3 is just a totally different experience. (and not in a positive way that is.)
It activates a spin when i don't want it all during baby scratches, and doesn't work reliably when I do want a back spin...
Please update this with firmware, and copy the feel of the SX2.