I don't think APDS would have as much of an influence as actual AMS would except maybe in vehicles. Its certainly nice but the SW was the era in which the Autocannon was particularly prominent before DHS were invented and missiles, while prolific, weren't as much of a threat as they are in later eras with half-weight Clantech and Advanced Ammos. Also their main opponents are not the missile crazy Mariks but the PPC crazed Kurita and the tricky but weak Capellans.
As I have a similar thing (although we haven't gotten to it yet) in my fiction (although COMSTAR gets it) I think the Laser Pulse Module would be very helpful (particularly if you didn't uninvent DHS like I did) against the Clans, certainly it would be a surprise although it might drive them to capture and reverse engineer it themselves.
I don't think Hanse would invest in them however at the cost of his other ambitions (Taking over the Inner Sphere and putting his progeny on their thrones). The drawbacks in reliability and expense would leave them in the same place as Dr Banzai and his successor's other creations like the MUSE configurations.