I ,as you might imagine, have a bit of a differnt spin on it.
For me this is how it breaks down, and how the Terra Prime material is going to tend toward:
The seven forms as described do not indicate much of separate styles as they are a means of progression. This is how I have been adapting the concepts.
Shii-Cho: is basics: stances, targets, strikes, parries, and basic combat strategy
Makashi: refinement of engagement with other weapons. distancing, reversals, movement, attack and retreat. control and precision.
Soresu: defensive technique repository. maximizing defensive capability through coverage, footwork, and endurance.
Ataru: agressive technique repository. Maximizing offensive capability through jumping, turning and running.
Shien/Djem So: Changing from aggressive attack and defensive strategy. Learning the dynamics of being able to change techniques at will.
Niman: Balancing the extremes of the previous forms. Loking at the formula abstractly and integrating those ideas into practice.
Juyo: The addition of intent, psychology, visualization, meditative aspects and creativity. Learning to let go and react in combat rather than try to predict or control. Setting the atmosphere and taking the initiative by one's own volition.
Now as one goes through the progression, they will focus on one or the other formula as a concentration. It seems unlikely that any of these forms would be isolated, but if they were, it would be interesting to see the concepts of the others interpreted with a single mindset. Soresu will attract some practioners because of it's philosophy. Some of those people will stick with it, or grow weary of the training and look for more material. Some of those will then later return to their original focus after a 'look around' and gaining more experience.
This got me thinking, is there room for vastly different interpretations?
Surely there is, but shouldn't kung fu look like kung fu, even if from different schools of thought and practice...Southern crane style compared to stone throw monkey is vastly different, yet the viewer would most likely say "ah kung fu".
Judo is a grappling style
TKD is a kicking style
Kung Fu is a artistic style
Karate is a hard striking style
Interesting that you would use kung fu as the example. The term "kung fu" doesn't really even mean martial art. It is an English term to define a group of martial arts that originate in China. SO if that's the level of detail we are talking about , fine. But you analogy starts to have problems with arts like Shuai Jiao, Ziranmen, and Jeet Kune Do. None of which look like wha most people define as "kung fu".
Also, the descriptions you offer are subjective in nature with respect to Kung Fu and Karate. TKD and Judo have rules which constrain the way they are performed incompletion or sparring. It is easy to say Judo=grappling and TKD =kicking.
But, Kung fu and "artistic" style does not give much of a description. If one sees ,say a San Da fight they would be unlikely to say "look they are fighting with kung fu!" as opposed to them seeing a kickboxing match and saying "hey look at them kickboxing". Same with Shuai Jiao and Judo, which are almost identical in technical aspects. I imagine that if you took away the GI and the Jacket and it was two guys going at it, it would be a rare person to be able to tell which one was "Judo" and which was "Shuai Jiao"
You interpretation will be a welcome addition and will add to the landscape, but I worry that we are shuffling a bit close to "this is the REAL style/form" type of thing which plagues the martial art world so much. Everyone's input is valuable. That is the great hint about lightsabering; NONE of it's real. We have carte blanche! There is a freedom here which is unprecedented in the martial arts world.
Who cares if my Djem So doesn't look like General Sun's? Maybe they are so different they don't even look related. Well, they aren't. They are two unique perspectives within a greater landscape. Ideal is subjective and everyone has their own ideal.
We have a saying in Chinese martial art "Nobody cares what the punch looked like when it knocks you out."