Brad,
I suspect you're not used to working with wood, and are not understanding what I meant by 'runout'.
Wood is composed of long stringy fibres, which run approximately parallel to the direction of growth. Wood is very tough along these fibres, but weaker across them. Think of a log - it's hardwork to chop it into two lengths, but pretty easy to split it lengthwise with an axe.
Ideally, a piece of wood will have fibres running parallel with it's long axis - this is a board with no runout. As the grain departs further from parallel to the long axis, the more runout you get, and the weaker the wood becomes. If you cut a 1 piece blank to create a headstock angle, you get *a lot* of runout, and a very weak headstock. Running the grain of the ears parallel to the headstock makes it stronger.
Your current situation will be as strong as a 1 piece headstock, but not as strong as it could be.
However, this is a sidepoint to the real issue - which is that cutting the headstock angle with the ears attached will be much more time consuming and confer no advantages, whereas cutting them off and regluing them will save time *and* produce a stronger final product. It's analagous to missing a turning quarter of a mile from your destination, and deciding to drive 5 miles to avoid turning around. Sure, you don't have to go back the way you came, but you have to drive further, and for longer.