i think i just figured out the recent update: valve didn't actually remove item sets, the just reoved the perks and "nerfed" a few weapons so they'd be used together, like the liberty launcher and dead ringer, so they'd be used with other weapons, like the reserve shooter and l'etranger.
if they're going that route they should give the tomislav -15 percent damage for a faster rev and weapon switch rate, seeing how the set includes a shotgun and brass knuckles.