I'm not a stickler for huge staging in my headphones, so the reduced soundstage on the T5 (3rd Gen) vis-à-vis the T5p (2nd Gen) isn't much of an issue (on a personal level). In fact, I actually prefer the revised model over its predecessor - the enhanced bass and a lusher sound with some silky overtones are a good blend, IMO. Of course, if you actually prefer the sharper attack and greater energy of the older T5p, the new kid on the block might disappoint.
For what it's worth, the T5 (3rd Gen) has been hovering at or near the top of my
"To Buy" list since its introduction.