As a longtime Mirai Nikki-fan I can't wait! Who cares if it's ruined, at least it will be quick unlike the slow and painful murdering of HnG lul.
Go watch you SAO, kiddos, find something better to do than bash this thing.
Sounds like it covers the stuff that happened in the manga but wasn't shown in the series (At least from what I understand). Strikes me as the perfect opportunity for an OVA just to wrap things up nicely.
Well people will always bash things just for the heck of it, so with those negative thoughts aside from someone who actually did like the manga and series i can say that i don't mind this but am not super excited for it either, somethings should be left alone.