I think they'll up our super charge a bit in the actual release. Like in Destiny 1 alpha lvl 8 was the cap and you really couldn't do much to boost super rates. I'm sure they'll have a mechanic to up the rate again like in Destiny 1, same with cooldowns. You could shave off minutes from your super with gear in D1, I don't see why they wouldn't do something similar in D2.