You have always been able to attack inhibitor and nexus, at least since I started playing Shaco at the end of Season 4, and this new rework can still attack, just make sure the boxes are tight close to the structure, like next to each other... ALSO kill all minions because your boxes will prioritize minions over turret and it sucks cause the boxes hurt a lot even without AP, specially if you do it while your canon minion is tanking the turret damage :3 TONS OF DAMAGE to turret.
NOW back to the POST lol yeah the reason i think is because backstab is not being considered as an ability for Thunderlord or something (NOT EVEN THE BASIC ATTACK ITSELF, DUMB), because you can proc thunderlords but it it takes like 4 hits usually or 5 if you backstab again lmao xD
IT SUCKS RIOT PLS FIX :(<<<<<<<<<<<<<<<<<<
Ult works fine for me, so does boxes, passive is fine but thunderlord doesnt detect it or something.