I'm not a friend of the soft 2" webbing crotch straps. I find that not only do they make the backplate more difficult to put on without a twist in the crotch strap, but they end up bunching up while scootering which is quite uncomfortable, and will over time give you a longer inseam length
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The 2" wide heavyweight webbing works better for me. If you fear that the heavyweight webbing will damage your suit, you can sand the edges of the webbing with coarse sandpaper to soften them. I haven't, and all 3 of my drysuits are still dry.
Michael