Since there was no "I care, and think KT is fine" I voted on the 3rd option.
Some toughts:
1.) If I want grindmats and I don't wanna sell the stuff to players - for whatever reason - I try to dig fine or even basic sources. Yes, dig is xp is a bit less, but not much and the crafting xp is the same. Also, failure/degrade rate *seems* to be lower for basic and fine than choice or higher. This might be just random luck, but you never know.
There are much more fine and basic nodes around, if you just want to grind, spread out and dig those mats. It has been more than once that just 20-30m from a 50% kamibar choice source I found fine/basic (same mat) with full bar.
2.) I would like that the Kami not just do a carpetbomb / orbital strike, but actually spawn, wait 5 sec and then nuke/whatever you. At least I could try to fight the little buggers
