If you think GZ is bad, try digging out some of the older MGS games.... ugh. At least they added a lot of options to customize the controls somewhat. Isn't just about anything changable? I haven't played GZ for a while, I admit, but I thought it was a lot closer to what we have come to expect from 3rd person games or even 1st person ones... maybe I just haven't played it recently enough though. :$
I do remember though being rather baffled by the lack of "killing" mechanics once you KO'ed someone. They are lying there, but there is no way to knive them in their slip - something I used to do a lot in MGS2, 3 and 4 (to avoid them waking up on me, then signaling for help). Playing a bit of ... hum... the PSP version one, got me to learn the art in fultoning your enemies. I believe this is a rather big aspect of MGS5 too (but missing in GZ?)? So it's not about killing enemies you have KO'ed, but to actually move them out to build up your army? Am I right?