You would seriously take Mikolas, Montgomery, Wainwright, Flaherty, Liberatore over Burnes, Peralta, Houser, Rea, Teheran??
I'd argue that Burnes, Peralta, Houser would all be the best SP on the Cardinals and that Rea and Teheran are both just as good as 40 year old Wainwright.
Mikolas 5.06 xERA, Montgomery 4.55 xERA, Flaherty 4.58 xERA, Wainwright 6.98 xERA, Liberatore 6.11 xERA
Burnes 3.80 xERA, Peralta 4.13 xERA, Houser 3.46 xERA, Rea 4.46 xERA, Teheran 3.64 xERA
All 5 of the Brewers xERA are better than any of the Cardinals xERA (and yes I know Teheran, Houser, Wainwright, Liberatore are still super small sample size)