For what it's worth. I just purchased the G9 last week but my initial read mostly matches the OP's except in a couple of instances.
1) The pincushion evf issue is way overblown on this forum. I have normal eyesight and barely notice it. What I do notice is the incredibly immersive and fluid view I get of my subject, it's a big upgrade IMO (coming from an em5ii) and one of the things I like most about the G9.
2) I agree on the IQ statements but I'm also finding a slight but noticeable improvement in high iso noise over the 16mp sensor. I'm probably more tolerant to noise than the average bear but iso 3200 was my quality limit with the 16mp sensor and I'm finding iso 5000 on the G9 to be my new limit. Also, the noise reduction is pretty smeary but turning it all the way down has improved things immensely. Overall I'm pleasantly surprised at the iq bump as it's just gravy to me. I was upgrading for speed and video capabilities.
Also worth noting that a couple of firmware updates have probably sorted out the AF niggles mentioned by OP to a degree. I upgraded as soon as I fired it up so can't compare to the original firmware.
Also, dual card slots rock!