Hey Vic. People use it different ways. I was using the TAGG for performance, but I switched out the HD500x for individual pedals which made it challenging to access them with my feet. So, I found that I liked it best at home near my workstation. Very effective, great for quick practice sessions, even if just for 10 minutes a day.
After seeing the way Steve had his setup, I am having to totally re-evaluate the way I have mine set up. This would allow me to use the TAGG with my pedalboard. Here I was thinking I had it all figured out, cistech comes along and changes the game....
The Stick is not top heavy, so even if you are using it a 90 degree angle, it is going to be firmly affixed to the stand. This is ALWAYS contingent on the location of the tripod legs. I may add a second video on the TAGG to illustrate this. So, my answer, no it is not more susceptible to tipping.
There are MANY players that like the instrument right up against them - I think that's great! The LapDawg and the Underdog are great options that allow you to retain that closeness. There is some separation with the TAGG, but it's just something you adapt to in the first hour of playing with it, then it feels quite natural.