I've been searching like mad for a new mechanical, and I'm tempted to get the G710+.
I have a Razer Blackwidow Ultimate with blue switches, and love the feel of it, but it drives me crazy with issues like keys not registering, bad software, and occasional 'sticks' where a key will register 2-3 times for a while and then go back to normal.
Looked at boards like the K90, but I am not a fan of huge banks of macro banks; one bank (5 keys) is perfect, three banks just makes the keyboard unwieldy... same reason I don't want a Logitech 510 - too much fluff.
Ducky Shine looks interesting, and heard good things about them, but for the same price point, the G710+ is looking like the better option atm.
To be fair, the standard Razer BWU model has some issues relating strictly to the use of blue switches (repeating keys occurs because the switch didn't return from actuation point - any mechanical switch, if left at the actuation point or below, will repeat until it's out of actuation). And the software most certainly did suck... have you updated to Razer Synapse 2.0? It is much improved.
Oh, and the standard BWU model has a bad key matrix underneath the switches. It's not terrible, but it doesn't provide a high KRO.
The Blackwidow Ultimate Stealth (aside from being the Brown switch as opposed to Blue) has better KRO. It has 6KRO, plus modifier keys. I think ultimately it can hit 9 or 10KRO if it's 6 standard plus modifiers (shift, ctrl, alt). Is it full NKRO? No - I don't think USB can even offer full NKRO. 6KRO imho is plenty for the majority of gamers, let alone anyone else. Gamers can definitely make use of 6KRO, so it's better than 3KRO (which the original BWU model offers, though it is higher for certain keys like the WASD cluster).
I noted a big difference between the two models (tried both), and am very satisfied with the BWU Stealth.
That said, if I was buying today, I'd
probably get the G710+. Not entirely sure, because while Logitech continues to trick me into buying their fantastic hardware, their software tends to leave me less than satisfied. They are hit and miss with software - sometimes great, sometimes flaky, sometimes horrible. And it varies with each version - great, great, then buggy as hell. With the G35, audio quality dropped when it switched to the Logitech Gaming Software package. The older G35-specific releases had better audio, and that's what I've stuck too.
The LGS platform for other hardware tends to be good though. I wish they'd bring the G700 into the LGS fold (I may take that back if they ever do, or I may be satisfied with it

).