The 710 is currently D2; the 790 is S30V. I love S30V!
The framelock on my 790 is quite strong and secure - the AO is alarmingly fast and opens with 'authority'. It's a great package 'as is'. The 755 MPR displaced my 710 as an EDC. The 790 became an adjunct on the days it hasn't replaced the 755. I initially thought I'd defeat the AO - but it's still there.
My only AXIS lock with an assist is my auto 6150 Auto mini-Rukus. I won't buy another AXIS lock like that!