The reason would be to disrupt the typical playstyle of: Speed, BP, Regen, Vision, ADS, Energy Shield, EMP Shield. It would also result in a "fully augged" player having slightly less augs, meaning they aren't as god-like.
Disclaimers:
1. I know this is probably impossible to actually implement
2. This is something that would've made more sense to discuss in 2005 or something
3. It may disrupt certain playstyles, but that's also the point
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With that out of the way, here are the aug trios I came up with:
https://i.imgur.com/fXhx6x3.png

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As an example, using these hypothetical choices, my augs would probably be:
A. Speed
B. Cloak
C. Power Recirc
D. Enviro
E. EMP Shield
F. Aqualung
What do you think? Again I know this is probably impossible and won't ever happen since it's probably too drastic, and not feasible code-wise (modified client?). Nevertheless, it'd be nice to hear thoughts on these groupings, or on the idea overall, or if you have any improvements for better, more balanced aug groups etc?