Droids have droidType, structures have stattype (structureType would be nicer) so for consistency it would be preferable if features has featureType.
As .stattype has only just been introduced on features, it's hardly used at the moment, but will soon become heavily used once campaign porting goes in to full effect, so now is likely the last good opportunity to rename the property. It would certainly make describing the property and applicable values in documentation easier


