There are several ways one could implement this, but my idea was basically to have an "intermediary" disruption function. That is, rather than PPCs completely resetting the target lock, which would frankly be OP as hell, they'd apply an extra bit of timer to the locking process due to sensor disruption, or possibly "freeze" the locked target position if you've already acquired, or somesuch. Already gathered target data need not be "thrown away", but could possibly be made to show temporary errors, and missile tracking should be disrupted for a short time. Possibly, the disruption from a single damaging PPC hit might not be very severe, but several shots at once or consecutively could be far more disruptive. Alternatively, you could make the disruption from PPCs apply to sensor range, with the explanation that the EM-interference of the PPC hit causes the affected mech's sensors to spike down in sensitivity as a result of the suddenly crazy input values or as a defense against damage due to overload.
This way, you'd have several gameplay elements of skill added; you'd have an effective long-range counter to LRM boating and quick spotting, however it would require a steady aim, and you'd have an equally hard time applying it in close combat against fast targets or without the advantages of an ERPPC. You could use PPCs to lay down suppressive fire to ward off LRM fire from your advancing lance if you've identified a missile-boating mech, or use them for ambush tactics to grant you a short but possibly significant advantage against either missile mechs or mechs armed with crit-hunter weaponry.
Edited by Mr Huge, 23 November 2014 - 11:29 AM.