There are many things affecting the center of gravity so where it was set may not be the center anyway. Plus a little variation makes only minor differences in handling that you likely wouldn't notice and if you did they are easy to correct.
If you saw the "ocean cockpits" that used to be more common (almost just a circle) then you'd appreciate how easy ANY keyhole cockpit is to exit -- unless you're so big you needed a shoe horn to get in. After your first wet exit and assisted rescue you'll relax so much that anything will be possible. No theory beat reality for that.
Canoe / Kayak Anchors
Full Size Sail Rig
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