Though there a several interesting fits/doctrines using the Target Spectrum Breaker (TSB), it seems to me to be a misplaced module. Why on BS as principally a GTFO module when in general terms a BS ought to be fighting its way out? Sure, for the defensive-types let them have it, but the TSB really ought to be useable elsewhere.
At a minimum, Deep Space Transports, Freighters and Jump Freighters should be able to use them. And if a combat sub-cap ship like a BS has them why not a carrier, FAX, Rorqs, Orcas or other cap size ship?
And so as to make not module to just be left running make its use a bit more player intensive.
Drains capacitor quickly; player had best be aligned and ready to initiate warp if the TSB is successful. After maybe 2 or 3 cycles cap will be at zero and warp can not be initiated.
Suspect timer; like ECM bursts, be careful where you use it. Not something I’d want but maybe appropriate to give some ‘balance’ for the high-sec elite PvP types.
Those are details but the more important point is the TSB ought to be fit on more ship-types.