Depending on one's needs getting the battery lower would help lower the the bikes Center of Gravity (CG) making it slightly more responsive.Taking that a step further; Perhaps the ideal place would be over the swing arm pivot bolt and then ditch the under tail exhaust for the same reason (to lower the CG) and run a shorty side exhaust!
That said, the easy path would be a battery not made of lead but I'm off topic as access and weight distribution are two different things...
But while we're moving the battery, changing the exhaust, changing the tail section - now you have room for a proper air box and maybe try to feed it some outside air! :/