For the Charisma and skill needed to use the empathy software, the restricted gear for the link, and money for the link, the program, and peripherals necessary to run it, it's only 76 Karma
Compare to an adept, to get the +5 from Kinesics and Improved ability, who does not need to improve his charisma, but needs influence at 4 for the ability bonus, it costs 110 Karma
Just paying for the bare minimums for bonuses, the Empathy software comes out ahead at a 12 DP, the adept is only at 10
If they were both to max out their charisma (6) and influence (4), the empathy software would be at a 16, where as the adept would be at 15, and would have spent an additional 39 Karma. He still has .5 PP leftover, I could not find an adept power that would give him an additional social die.
I looked at the cyberware route, which is the most costly, and all the social modifier ware is completely situation and up to the GM discretion. With the exception of tailored pheromones. On top of being money costly, it also counts against your essence score. If everything swung the cybered guys way, it'd cost 179 Karma to get a 15 DP, that's using both the pheremone bioware. He'd just really be "Wared" not necessarily cybered.
To me, empathy software looks like a point grab. But that's just my take on it.