Always in favor of cutting back the RNG aspect on progression.
Refining and grading are some of the worse experiences RO has to offer.
The RNG is only there to fuck the players up and encourage them to shell money at the game for whatever advantage it could net them, all while giving the impression it isn't rigged.
It's litterally how the officials make money.
MuhRO is good in that they already tried (and succeded) to make refining a lot less of a hassle (better odds, pity system, speed refine, etc).
Grading on the other hand is still as soul draining as ever.
This is a huge part of gear progression, yet I'm sure no sane person would ever touch it with a yard-long pole if there was an alternative.
Not sure about the 100% chance tho.