I used to split the pelvis too.
..sure don't have to and it's a lot more work.
..so I don't anymore.
I wouldn't choose to gut a deer with any knife that doesn't at least lock.
Too many times working fast as light is fading away.
Reaching up into the the ribs to get the pipes..I can just see a blade folding in on my fingers..no thanks.
I do like a knife with a little more backbone than you show..but only for splitting the cartilage thru the ribs.
I use a Gerber folder..3.75" blade I think. I remember something about Gator grip or something. It does seem to be easily gripped when bloody.
It works just fine..as most knives would.
It's nothing fancy but it does the job and keeps an edge surprisingly well for stainless.
It has a nice tight lock too..no slop at all after around 10 deer or so. Not that a deer is big work..but that's all I use it for, so it's all I can say..lol
It's long enough for "bung" work too lol.
http://www.gerbergear.com/Knives/Folding/Gator-knife_46069