They can... but they won't. Meaningful QoL improvements of any kind (especially RMT related) are so rare that you'd likely manage to never fail a minimum of 100 overmelds in a row before you see them. They basically want to ignore the bad, but simpler fixes, so that they can focus on developing new content. This isn't unusual to MMOs, as improvements to the existing functions/features don't happen much until they can no longer provide content (i.e. the game is dying).