False, all commodities are NOT settled in USD.
...any talk about removing the USD from what is the largest pool, crude, is definitely a primary step in that argument
Again, no one is talking about removing or replacing the USD...they're developing alternatives.
For example, the Petro/Yuan began trading last week.
Ugh - you are talking about a microcosm of the greater world market.
The standard convention for pricing in commodities is USD. Yes you can have cross currency transactions take place but until those supersede the standard, they are noise.