well i have deffinitely experienced extreme confusion with fungus, but I have also experienced absolute clarity with them as well. The confusion was when i was younger, took too much, couldnt even begin to understand wtf was going on lol. My last couple of trips (which were all over a year ago) I didnt experience as much confusion. I think this is because I am more experienced and comfortable with them now, and also I have started ingesting the mushrooms via tea (i dont know if this actually makes a difference or if its just me but it feels cleaner and less confusing this way). Knock on wood lol, planning to trip for the first time in over a year here in about a week so well see how "experienced" i really am. I really try to be careful with that kind of thinking, mushrooms dont take kindly to cocky attitudes i have found.
To get back on subject though, after the peak of a good trip I usually have mixed feelings. On one hand its good to be back on earth or at least on your way there, on the other hand I wish I could just go back to the peak and the beauty for a while. So I think in this state some change might be pretty awesome.
A question though, what if while you were coming down from the fungus instead of just smoking dmt you did some maoi with changa to prolong the effects a bit instead of just blasting yourself into the ether all at once?