If you want just one tarp to cover most all circumstances I'd leave your tarp as is. You could add Cat cuts and it would help to make it pitch tighter faster but not neccessary.
I made a hex tarp as many have, although instead of following the blackcat plans I used a bit of pythagorean theorem to determine the angles of the sides and used a long bit of pvc to form the catenary curves which I traced onto the fabric and then cut out. The hemming of the cat cuts wasn't hard, just slow going as you can't really go full bore on the thread injector with curves, or at least I can't.
As already suggested I would just add in some extra tie outs that you could use to create doors and pitch your existing tarp in hex patern when desired.
Oh, and welcome to the high life.