The result of sensitivity analysis (the coefficients) helps us decide whether the estimated ATT was the pure effects of the treatment or not. But, on which coefficient should I focus more?
you can find interesting information regarding "Sensitivity Analysis" on the website of prof https://www.researchgate.net/profile/Andrea-Saltelli-2/research
Regarding effects of the treatment and the coefficients to focus on are two different questions that you should consider based on your research question(s).