“Any advice on matching aid?”
Dont bother asking. Wash U is not a “peer” of Harvard, at least in Harvards eyes.
If it were SYP, they might consider offering more FA, it but since it a merit scholarship, and the Ivys dont offer them, calling would just be a waste of time.
We went through the same situation- full tuition scholarship vrs and Ivy acceptances- The Ivys did not budge.