I have the griffin for only a few days but send fine.
Otterbox and Griffin attain ti meet Military. Grade protection, so things tend get bulky.
I think it's a case of trimming to suit you not the military, if like me you use your phone in harsh environments, then some bulk is not a worry .
Typing issue caused by the middle buffers could IMHO be fixed with a simple rework with a craft knife,
@ £20 Inc p&p for a Griffin, you could easily have a couple adapted for all your specific needs.
CP