What do you mean by "no substance"? What do you feel is so inadequate in the scenario training? MartialTalk isn't twitter... you're allowed to use as many words as you need...
No substance
The core part of the system is the use of the shapes or using the terminology of the system, "shape shifting" the problem with this is that us causes what ill refer to as "forcing", Ie forcing a technique to work because it uses the shapes.
Past the shape-shifting it takes elements from other arts and teaches them at a very surface level.
Scenario training.
I don't agree with the idea of scenario training, its develops a very fixed response to what is a dynamic situation, person does X I do Y and Z happens. This doesn't prepare you for when you do Y and Z doesn't happen.
Drilling
The majority of training is long format strings of drills, my issue with this is the lack of aliveness in the drills themselves and the assumptions the drills make.
Techniques and methodology
The ground game is very very thin BJJ with skin tears, at no point in years of training was i taught how to bridge, do basic elbow escapes, sweeps or shrimp correctly, all of the positions of bjj are covered but the escapes are reinforced with dirty fighting even in a non dominant position.
Multiple techniques rely on the pain response, this is unreliable and even worse some actually require you to have one of the defense lab rings in order to actually work.
Overcomplicated techniques that could be simpler
Examples of this are the responses to grabs, pushes against the wall, escapes from the rear chokes.
Techniques that are just flat out useless, punching the feet, punching behind your own head, punching over a persons head to hit their chest.