I don't see any C+ rows on an A350 seatmap. If it's true that's really disappointing. I completely get it when they don't want to upgrade elite members to Premium Economy on space available basis (though AA is doing that). BUT why they decided to take away C+ seating benefit from elites? Doesn't look like a smart move.
Again, if we look at AA, they have business, premium economy, MCE and main cabin. So they're actually improving perks to elites.