UA will further worsen the situation for medium spenders. GS and mileage runners will be fine as they were before but for 1Ks and below on H fares or below things will become even more dire than with UA's current clumsy attempts to reward spending on revenue.
Because they cannot really track the latter - face it apologist, they cannot even accurately track the miles credited - they will further tweak the prejudiced priority schemes which then in turn will work against 1Ks and other lesser elites.