Since 2 games after Shez took over (after 26 games with 21 points) we've played 17 games and got 30 points (43 games and 51 points).
That means an average of 30/17 = 1.764705882352941 points per game.
Multiply this by 43 games (if we had kept this form up all season) and we would currently lie in 3-4th (depending on Walsall's result in their game in hand). It is roughly 50% more points achieved in 50% less games than previous two managers combined.
From 2nd bottom to third = some improvement under Shez.