Those are all fair points. Perhaps I should have been clearer that I was not making an apples-to-apples comparison. The benefits of going with an A7 series camera would be the full frame format, and to fully realize the benefits would impose high costs in terms of money, weight, and bulk.I'm not a fan of Sony's E-mount ecosystem either, but I really despise seeing this comparison that a lot of MFT fans make. The new sony 24-70 is designed for a full frame sensor and it will be correspondingly bigger. A full frame camera gets more light and depth-of-field, and I'm sure you know this. It's all about tradeoffs and though I'm sure you're at peace with the tradeoff you made, the weight/size/price comparison is a poor one.For example, the new Sony GE 28-70/2.8 looks like a terrific lens, but at nearly 3 times the weight and price of my sweet little Oly 12-40/2.8. And I can take along a couple of fast primes to handle the low light situations.
Downsizing to the A6300 and the FE 24-70/4 would make good sense. But in that case mft offers more versatility and options.
So yes, I'm very happy with extending my investment in Oly gear.