The accuracy for different attacks is averaged. Often, that makes the whole attack more reliable, yes.
Anyway, did you see my post? There was a slight error due to an obscure rule in Mado vs. KS. It... does have some potential reprecussions, though...
Hi. It's true that damage is rounded at the end of a round, not during it. However, if at any point, a Pokemon has 0.5 HP or less, it's KOed immediately. That's the only case where damage is rounded before the end of the round though