I agree, probably best to wait for the next generation. I've had the NEX-6 and the a6000, but only because the a6000 came down to $398. Otherwise I'd have waited.
The main reasons people are switching are if 4K video or the mic input is important, or the upgrades for adapting A-mount or Canon lenses. A few are switching for the improved autofocus, which would be the only important upgrade for me, but the comparison tests I've seen aren't quite dramatic enough to justify $1000.
For me personally, investing in lenses is a smarter move right now. They've been pretty consistent in upgrading this line every two years, so I'm content to wait for the a6500 in 2018.