I agree it can make the bodyload of 2C-I more smooth, though some actually don't really mind the feel of being on an upper ride, believe it or not
And it can instantly make 2C-I's "Oh, cool" major trails turn into more like industrial-strength "Holy Crap!" trails that you can practically cut with a knife, I have found.
Of course, pot on ANY psychedelic increases the strength, euphoria, pleasant body-high sensations, and most notably the visuals, but also may increase likelihood of excess anxiety / bad trips (especially on shrooms).
HOWEVER BE AWARE: on any kind of trip, for me and alot of others, it can markedly reduce the sense of heightened super-human mental clarity, capacity, and power, that is one of the main attractions of psychedelics, making everything seem "muddier", less crisp.
It can reduce the ability to remember aspects of the trip, especially stronger ones that might be more confusing to begin with, via its well-documented impairment of short-term memory.
I do still often (but not always) smoke while tripping. Sometimes there's a little mental battle between my "Oh go ahead - it'll feel so goooood" 'Devil' on one shoulder, and my "Now now, remember what you vowed last time when all those amazing towers of thought and cosmic awareness crumbled into mush" 'Angel' on the other.
If I do do it, I try to take only carefully modulated hits, letting each sink in, just till I feel the first hints of trip enhancement, then I will put it aside till well into the comedown, if at all. It tends to also come on more from that point via the creeper effect. It seems that if I follow my natural pothead pixie urges and keep toking frequently just because it can feel so great while tripping, it can gradually dull the trip substantially, turning what had seemed like looking into a perfectly clear trans-dimensional crystal glass ball... into squinting into a ball of dark smoky quartz... still very interesting and cool, but somehow not quite as "Whoa."
