Strongly agree.
At 8.6 fWAR, the rotation was 18th in the league. If they perform how I suggested above, they should be about a 12 fWAR rotation. It's a 40% improvement! However, they'd still be middle of the road at best and maybe ranked 14th in the league. For reference, the much maligned 2015 rotation was 13th and had 12.9 fWAR. The really bad rotation that we stopped talking about a long time ago was 2012 which was 28th and only had 4.5 fWAR.