cap said:
JarHead413 said:

I don't know how much time the DS needs between shots. Might be a day to recharge that thing

That certainly was not the case in ROTJ, but who knows, maybe technology advanced in four years from “takes a day to recharge” to “takes moments to recharge even when the darn thing is only halfway built.” True, this is a universe that had no significant technological development for thousands of years, but you never know.

I think it's been established the DSII was deliberately made to look incomplete, so as to make it a more tempting target. It can also be argued the superlaser was not firing at full strength when taking out Rebel fleet ships, so faster recharge time.

Of course, none of this explains away making an even bigger design flaw than the original. Exhaust ports big enough to fly into! ;)