We don't need an ace, we need a mid rotation starter and a a front end starter. It's not like there are 30 aces in baseball, there are more now than in 2006-2007 but there's still not one per team in the league.
Fiers fills a need now and he fills a need going forward. Getting someone like Fiers and someone like Ross or Cashner does a huge amount to help the team now.