What do you get out of going NG+ that many times? Maybe that's a spoiler but whole NG thing puzzles me.
Well NG+10 is the "max", each NG cycle you get a slightly better set of armour (but still, armour you get normally in the game is better). The ship stops at NG+6. Apparently the difficulty increases along the way too, so at NG+10 you take 100% damage but you only deal 50% damage.
If you are doing it "properly", each NG cycle also resets all the temples, so you are supposed to complete as many that exist to level up your powers to X (10) too. That is 240 temples to complete, and I despise them, and barely use powers, so I've mostly skipped that.
I don't think that's really spoiling anything. I'd probably advise people not to bother with NG+ now. Do it once to see the "end" of the game, but then load your prior save before NG+ and continue playing however you feel fit. Maybe stick to the first NG+ cycle if you feel like making different choices in playthrough.
At this point though, I'm close to the end of the grind, so might as well hit 10
I am curious to see how the DLC will fit into things though.