Is there anyway to keep using the updated FGDs but to have the player spawn entities the old way?
Yes , just open both FGD's with notepad or
EDXORand change the new one to look like the old one for them entity's
Example: @PointClass base(Angles) studio("models/player/urban.mdl") = info_player_counterterrorist :thats the CT start entity from the cstrike fgd.
@PointClass base(Angles) studio("models/player/terror.mdl") = info_player_terrorist : <--T start entity