I'm trying to figure out whether leverage plots can provide valuable information. See example here.
According to Sall (1990):
Leverage plots can show the point-by-point composition of the sum of squares for a hypothesis test.
Still according to the author:
They are valuable in revealing the degree of fit, the parameter estimates, the residuals, a measure of the variance of the fit, influential points, nonfitting points, nonlinearities and even collinearity
Sall, J. (1990). Leverage Plots for General Linear Hypotheses. The American Statistician, 44(4), 308–315. doi:10.1080/00031305.1990.10475750