Windforce is not redundant, since it’s a progression item towards Faith and thus fills a role. It’s still a very good weapon to use regardless if you decided to stop grinding for rarer gear and stick to Windforce.
I have - I have talked about Grief in my other thread here:
Just because the game contains items that are obviously overpowered for their investment level, doesn’t mean I endorse it. There’s plenty of other examples that also need to be reviewed around rarity vs their power level.