Quantifying the loss of seniors, interestingly Princeton loses the most minutes (over 1900). Penn is a shade behind (over 1800), and Dartmouth (1700) a shade behind Penn. Dartmouth is the only team that loses 2 starters.
Pretty big drop to Columbia around 1100.
None of the other four lose a starter. Yale loses about 600 minutes and a rotation player in Yates. Brown loses Massey and over 300. Cornell loses a little less than Brown, and nobody who was consistently in the rotation (after Bathurst got hurt). Harvard lost the least minutes and only deep depth (though they lost a 4 Star and a 3star recruit).