I think /god is indeed a bit too OP, especially in the first stages of Oneblock in case of a possible reset in the feature. If you have /god in the first days of oneblock it would be way too OP when mining the OB. If it's just about lava you can take a fire resistance position or e-gapple. Sorry but -1.
I agree that /hatse III is pointless since you have is upgrades, beacons and even custom enchants that give haste III. Although same point as above I think haste IV would be too OP in the first stages of OB, for the current OB definitly a +1, but take this into account after a possible reset in the feature.
I also agree that there should be an upgrade in the kitsune/ninetails kits, it's basically the same as Foxgod(des) now. First of all I think that the tools/armour should get an upgrade, so it's better than Foxgod(des). Maybe it's nice to add some multipliers or vouchers to it? As they are very usefull this season. Key is not really neccesary as we already have /redeemkey.