I don’t see any difference between older and newer kata. When you analyze any movement for it’s potential it is always large,
Back in 1990 I was working 50 applications for the opening movements for Isshinryu’s Seisan kata, and documented them. A few years later I was past 75 applications. Today I see quite a few more.
If it is a different version there are still applications, Perhaps some of the same answer I saw, perhaps new ones.
The mission, whatever version you use, is still how to insert the technique into an attack and make it work.
It is interestins historically what the versions original intentions were, but not the end all of training.
All movement can be applied. The goal is to understand how to apply the move to an infinite number of attacks, and make them work.
Of course the entire range of subsidiary training,such as hojo undo, makiwara, kobudo training for decades as a force multiplier all must be considered as part of the form, You can’t break training into pieces without losing pieces of the puzzle. Also this is what make this such a long study.
Time is the key, there is no shortcut in skill development. The ultimate force enhancement, time in training.
This knowledge can keep increasing while in time you grow weaker. Knowledge to maintain increasing ability while time ages you.