The foam board is really good at absorbing energy locally, so you normally won't see damage far from the impact area. Still, look at stress points, anything bearing mass, to see if anything else may have crushed a bit. Regardless of what you find, don't be afraid to chop out damaged areas willy-nilly. With a little knife work and sandpaper it's trivial to shape, try-fit and glue in replacement bits.
I dove my FT Explorer straight down into the ground twice under power. On my last crash I demolished the front end, ripped the wing in half, destroyed the wingtips, partially accordioned the power pod, and broke the tail boom in half. I thought the plane would be trashed, but I was honestly surprised to have it better than ever in an evening's work. I glued the tail boom back together, built a new front end and nose cone from plans, traced wingtips from the crumpled versions, grafted everything on with hot glue. Everything else, I just cut out areas and glued in replacement foam board pieces from scrap.
Here's after photos of the wingtips, power pod repair and reinforcement, front platform graft job, tail boom, and center sections of rejoined and patched wings. Not as pretty since I haven't repainted the repairs, but structurally good as or better than new, and flies as good as it ever did. Better, even; I took the opportunity to lengthen the nose, shifting the CG forward and allowing me to get rid of 60g of ballast.