For gacha rate, it is back to each person's own luck so don't take this seriously. Out of 20 rerolls, 7 of them are SSR but didn't get what i want, which is Sky Ship Ronvalion(Rumored to be the best Ark in the game until now). It is not as harsh as Epic 7 or FGO or any games that published by Efun or even The Alchemist Code, the rate up is quite tolerable.
As for dub, why not Dual Audio..... It is a pain to shut the volume down because of English Dub... Welp it is not that i'm a weeb who demand JP Dub over EN, because i prefer my DMC5 with EN Dub, God of War with EN Dub, and some other. But for Last Cloudia, i seriously prefer JP Dub(This is just my own taste)