I used Syrian Rue for the first time recently. I ground up and ate 2 teaspoons of seeds, which was way too much I think. In hindsight 1 teaspoon would've been enough, but I guess the whole point was to experiment with dosage, so it didn't hurt to go overboard this once.

The effects were astounding. The visual effects were easiest to understand: My normally acute sight devolved into what I would describe as long-exposure images. At its most intense, I could move my eyes from one direction to another and the image I was seeing wouldn't follow for what seemed like 1 second. The same sort of time-lag/blur was probably occurring with all of my senses as well as my thoughts, but the visual aspect was the easiest to identify. It is easy to forget that sounds and motion are not cross-sections in time, but rather they require information from perceptions that are distended in time. In our normal perceptions this sense of time-distention is filtered from our awareness, but during the Rue experience I found it to be exaggerated to a level that could not be ignored (or maybe the normal filtering was simply absent). All in all it was a perceptually enlightening experience that was nevertheless harrowing.

One of the most perplexing parts of the experience was a change of my sense of taste. Normally I wouldn't drink water from the tap at my place because we have well water and it has a very strong and unpleasant bitter metallic taste (low pH?). However, on this occasion, a friend who didn't know better brought me the tap water and, to my surprise, it tasted sweet; as though the bitter metallic taste were replaced by a light sweet flavor. Perhaps this is because the Rue powder I threw up had depleted my tastebuds of bitter/metallic receptors (not sure if that is even possible), or maybe the drug experience somehow results in my wires being crossed in such a way that bitter/metallic tastes were perceived as being sweet.

Anyways, I thought it was very interesting. The lesson here is "1 teaspoon is enough".

I've experienced both of the phenomena you describe, but from smoked harmala freebase.

I too enjoy dosing very high on harmalas. I normally do 6-10g of rue tea split in parts about an hour apart. Just sitting with your eyes closed is blissful and relaxing. Different thought patterns, it's like my stream of consciousness is constantly on and tangenting. But then at the same time I can concentrate on a state of 'non-thought' and unlike practicing meditation sober I can stay in that state for much longer periods of time. I think it's really underrated for those who like to take the edge off without delving into ethanol or cannabis products. Not nearly as addictive.

Dropping oral micro doses of DMT(5-20mg) after the harmala high fully manifested itself is interesting. Different than normal low-dose aya.

Harmalas are interesting. I've taken rue alone a few times and got similar effects. I also enjoy high doses of passionflower (~1 oz). Last week I took the vine for the first time with no light.
All 3 of these have effects in common yet they're also very different.