The EUA became worthless when CO moved to actively market the various upsell/buyups options for tens of dollars (not that I have any say in that, its their airline to run or ruin) but the kicker was there was no fallback for elites who no longer had their "cornerstone" benefit save a smattering of bulkheads and exitrows in a cramped Y cabin. This is an area when I think CO can learn from UA/AA/DL in offering E+ so there's at least enough seats with decent legroom to accommodate elites and offer a free drink/prepackaged food item for upper elites in the back.