Well many many people have killed TIM and not once has the ranged init buff scope dropped. Strangely, I got two of the supposedly more rare Engineer scopes to drop.Patch Notes
Boss monsters in the BIOMARE dungeon will have a chance of spawning more often. The unique loot on the boss monster will have a less chance off dropping on each spawn, but the overall drop rate should be the same as before. The bodyguard and neutralizer will have a higher chance of dropping their special loot.
Cz, can you check into this. The patch notes obviously say that it should be dropping as regularly as before.