By far, the best entry is the "Sunkist Splash." Try it. Stand on the back of the platform, holding your gauges/computer/octo with one hand and your mask and primary with the other. Look up... up.... up... until you just tip backwards. It's like falling into a feather-bed because the tank takes every bit of the impact.
I've never had a problem with the crotchstrap, even when diving without a wetsuit, or wearing a 1.5mm, and like someone else said, it does seem more crucial on the surface than underwater. I also avoid filling my wing 100% when I'm at the surface. I usually blow two or three long breaths into it (Rec Wing) and that's plenty.
Also, why fight the crotchstrap when you're gearing up? Just sit down, if you aren't already, reach beneath and pull the crotchstrap up and buckle it before you stand up. Make things easy on yourself.
P.S. Why would you ever put your weightbelt on UNDER your crotchstrap? If you needed to ditch your weights, or just hand your weightbelt up to the boat, at the end of a dive, having it UNDER your crotchstrap defeats the entire purpose, doesn't it? *scratching my head..*