My interpretation of those two paragraphs on page 128 where it speaks of specializing and then buying is:
the second paragraph is then going into a deeper description of what it means when you are specializing in a martial art. Ie: you are buying it for 7 karma and getting 1 of 6 techniques along with it.
However, I'm willing to admit it is somewhat ambiguous and you might be right that they do have MA spec and then buying the MA style separately. I think it was a very bad decision to give these the EXACT same costs/time as specialization if they are, in fact, separate purchases.
[EDIT:
the corollary is that we now have this nebulous Martial Arts Style entity that doesn't really fit anywhere in the character sheet. It's not a skill, it's not a quality, wth is it? Also there's still no reason to pick up a sword spec as the MA style can act as that spec for no additional cost. The only difference is now you have an option to purchase a MA spec that will give you +2 on at most 5 techniques. The MA spec in this version is not a great value proposition generally unless you've heavily invested in MA techniques.
Martial arts styles may also be selected as specializations for the normal cost of 7 Karma—selecting that specialization provides a +2 bonus when using that technique
This is actually a really badly written sentence (and basically the whole cause of this debate) as it's equating a style to a technique which are clearly two different mechanical entities. Are you sub-speccing in a technique or are you speccing in the style, giving +2 to all techniques for that style.
]
Admittedly you are getting a bit of a bargain if you are getting a weapon spec + technique at 7 karma. It would certainly make non-MA melee weapon specs less appealing (though I think it does this with either interpretation by a varying degree).
For the record I think your emphasis of "can" and "may" is somewhat misguided, as this whole block is describing options for character generation. How else would that be written? You MUST use your martial arts style as a specialization in the appropriate weapon? Obviously "can" is the natural phrasing here. I '"may" purchase a martial art style at chargen as an unarmed specialization' is obviously describing an option I have. I must purchase? Doesn't make sense as taking a style is in itself optional.
~~~~~
Regarding the mirror stuff on the armor. I never liked how you couldn't jam a commlink with noise but I guess that would be one use for it (although dumb, fluff-wise). If you wrap your sam in mirror then he will lose his wireless bonuses due to noise anyway so I'm not sure how to really use this stuff tbh.