Yes, that is completely correct. The Ponce/Alhambra parking garage kinda ate up a tiny corner of the southern end of the easternmost Greentree field, and an IPF expansion would wipe out a big chunk of the northern end of the field. And if you actually look closely on Google Earth, it looks like the southern goalpost on the (current) easternmost field is on the goal-line, not the end line. So it's a 100 yard field missing a chunk of end zone and having the goal-post at the goal line like it's 1957.
You could probably use "what's left" of the easternmost field as a "linemen practice area" half-field, but if you want two full REGULATION-SIZE outdoor fields, you have to move to the west, where the track currently sits.