The only problem I see with crotch straps is that it goes just where the weight belt goes.
Normally you will don the weight belt and then the BCD; tank and reg. With this, the weight belt goes under the crotch strap.
If you don the BCD and after this the weight belt, it goes over the crotch strap. It's much easier to don the weight belt and then the BCD.
The weight belt should go over the crotch strap to allow quick release in case of an emergency ascent.
Of course, if you dive in warm water and all the weight you need is in your BCD, forget about this.
Normally you will don the weight belt and then the BCD; tank and reg. With this, the weight belt goes under the crotch strap.
If you don the BCD and after this the weight belt, it goes over the crotch strap. It's much easier to don the weight belt and then the BCD.
The weight belt should go over the crotch strap to allow quick release in case of an emergency ascent.
Of course, if you dive in warm water and all the weight you need is in your BCD, forget about this.