I haven't looked at everything in proposal 218, but I would suggest maybe splitting the CELL_STATS into CELL_STATS_LOCAL and CELL_STATS_NETWORK:
"650" SP "CELL_STATS_NETWORK" SP CircID SP ConnID SP Added SP Removed SP Time CRLF
"650" SP "CELL_STATS_LOCAL" SP CircID SP ConnID SP Added SP Removed SP Time CRLF
...if only to make the definitions easier to read without the N- versus P- prefixed variable names.