On the numbered points:
1) The text states that "Cultured Bioware
must be tailor-made for the body in which it will eventually find a home" (emphasis mine). Not "usually is"; it's quite a strong rule (even if spelling it out might have been better). Semi-official answer:
http://forums.shadowruntabletop.com/index.php?topic=12106.0 reply #4.
2) You're not the only one that read that wrong, Zelda...`
3) Besides the relative waste of a PQ, running around in Milspec... attracts attention. Not that it's not good to have, but like Zelda says, there are better ways. (If you do, eventually, buy Milspec, might as well go for Heavy - despite the name, Heavy is not any more cumbersome, and they're both very unsubtle).
4) ZeldaBravo's consolidation would be all you need indeed. Note that you don't need a Driver's Licence - that's not a restricted activity or item (as far as the game is concerned, anyway). Although you're right about the armor.
5) Sneaking is really the only one you
need from stealth. (Not that the rest can't be useful). Social skills are more diverse. If anything, Leadership is one you don't really need - that only really becomes useful when you're an actual face, and a dice pool of 4 isn't really going to help anyone. Intimidation is good, and at least some Etiquette, Con and Negotiation usually comes in nicely.
On SINs, I don't think you can actually get 2 SIN's. Well, you can, but not as a Negative Quality. I disagree with Reaver - it doesn't give you twice the chance to get caught. Nationalities and corporations don't all share biometics freely, only in special circumstances, so it's not like everything will be checked twice. It does mean your records are on file in two places when people do start digging wide, but that's not
that much worse than having them out there once. Certainly not "Have another 5 karma"-worse.
Small point on Bone Lacing - it increases your Body by 2
only for the purpose for damage reduction. Granted, that's one of the main things, but listing it as 5 (7) implies it counts for everything, which it doesn't.
What rating is your Medkit? It should be 6 (any less is kind of meh), and it should be listed.
If you have nuyen and essence left, you might consider a Datajack and an implanted Smartlink. The first gives DNI (useful for all sorts of things), the second gives a +2 instead of +1 dice pool as wireless bonus. They're both not that expensive.
Armorer isn't just armor btw - it's weapon care and modifications too. So that would indeed be good to get soonish. (Basic weapon care is also a part of the firearms skills though).