The “light and heartful” is what I hear as the infectious swagger in his playing.Yes and to be honest it is after reading your comment that this comes back to my mind, and searching for a comparison the particular exhuberant effortless way Morgan play remind me of Armstrong in the screaming high notes...Screaming is not a critic here in my mouth at all only a metaphor to convey my subjective impression...
His inventiveness remind me of Miles Davis...