Ok, so I'm going to take a look at what I precive as being the street sam's actual Strengths and weaknesses compared to adepts at both character creation and during advancement.
Now the biggest thing that I have seen people up in arms about is the wireless bonus on wired reflexes. however, this bonus is the only way to get past the +4 attribute bonus cap in the game, and the only way to stack reaction enhancment in the game. so at the start with wired reflexes 2 and reaction enhancment 2 you can start with +4 reaction and +2d6 initiative dice. You pay a heafty price for this that is even steeper due to the fact that you CAN'T get alpha in character creation on Wired reflexes 2. So with Alpha Reaction enhancers you pay a total of 3.48 essence and 151120 nuyen. Compaired to Synaptic accelerator 2's cost of 1 ess and 190k nuyen this seems pretty steep. The real trade off that you are looking at is 2 reaction for 2.48 essc and 50k Nuyen.
Compared to an Adept's increased reflexes 2 at 2.5 pp and gives +2 Reaction and +2d6 inititive dice. Compared to Wired reflexes 2 adept wins hands down. Compared to Synaptic boosters Sam Wins, IMO. EDIT: Adrenal boost ads +2 Ini per level is a free action to use last for one round and you take drain equal to the number of levels you have. .25 PP per level. However upon reading increased reflexes again it states "the increase cannot be combined with other technological or magical increases
to Initiative."
Aluminum bone lacing is 1 essc and cost 18k Nuyen. It gives 4 damage absorbing dice (2 body 2 armor) and an unarmed damage code of STR+2 P. For an adept to get the equivalent of this they would take Mystic armor 4 (total of 2 pp), Killing hands (.5) and critical strike (.5). This is not a 100% apples to apples comparison, the Sam would still have an extra +1 to his damage code, but the adept can damage spirits.
Muscle replacement 2 would cost 2 essc and 50K and give +2 STR and Aglity. To do the same with Muscle Augmentation and toner would cost .8 essc and 126K. An adept would have to spend 4 PP on improved attribute to achieve this.
Adrinaline pump 2 gives a +2 bonus to all physical attributes (Incompatible with other reflex enhancement) for 2 +1d6 rounds afterwards you take "drain" equal to the number of rounds it was active and you ignore injury mods while it is active. Also it is a free action to initiate. There is no direct comparison to the adept at this point. Attribute boost is .25 PP per level effects one attribute, takes a simple action to activate and last for a number of turns equal to hits generated during activation.
Cyber eyes 3 cost .4 essc and have 12 capacity. With that you can get Flare comp, Low Light, Smartlink, vision enhancement 3. Cyber eyers are .4 essc and you can get similar bonuses (i'm getting tired of flipping through my book) Enhanced perception is .5 pp per level.
a smartlink installed in a natural eye or in a pair of cybereyes is more effective than a smartlink installed in an external device'
Sams can implant an ultrasound sensor, which is all sorts of amazing.
Lets look at advancment really quick then i'm done.
Initiation cost 10+ (3xnew rating) so 13, 16, 19, 21, 24. and 27 for your first six initiations.
Raising magic from 6-7 is 35 karma.
If all you are after is power points then taking Adept power point over a meta magic 6 times, is far more efficient than raising your magic for power points.
Meanwhile what can the Sam do with this sort of Karma?
At 13 he can raise one active skill from 0 to 3. or 2 skills from 0-2 or up a single skill from 5-6
at 29 (total) he could take a skill from 6-8 (ok he would really need 30)
at 120 total (the cost of 6 initiations) you can take a skill from 0 to 10 or one at 6 to 12. Or take 10 skills at 3
Or take an attribute from 2-7(Ok you need 5 more karma) or take an attribute from 5 to 8 and have some change leftover.
So IMO i don't see a huge gap in the balance. The high power points are amazing in advancement, but a street sam can also continue to advance his body with his nuyen (adepts can buy focuses but that will require more karma) while becoming very skilled or greatly improving his attributes. Sams and Adepts are not apples to apples. Adepts have no hard cap on their power points, but while they are initiating a pragmatic sam is learning more about fire fights, learning to haggle at the nearest car lot, running track and lifting weights. I find that as games go on my Sams have been many times more versatile than adepts, and could have enough flexibility to be useful in almost any situation.