Here's some feedback from someone who actually has a rather high KC.
I've had 3 dry streaks that were notable: 98, 121 and currently on 127 and still going (lol) and plenty of 50 dry streaks. The content is literally not even rewarding. At least 150 raids were done post update, the rates seem exactly the same. Not to mention the update making deaths effect loot just hurts new players when its already dead content. The MVP just boosts one players chance of getting an item. Not a buff to the general drop rate. 100 dry= 33 hours with no reward roughly. These dry streaks are done over bonuses, duos, trios and plenty of 0 death runs. This isn't just me i know maybe 10 players with all different ranks going 90+ dry. And obviously many of these players use point boosters and drop boosters.
Another thing to consider is that this isnt OSRS. This is a RSPS. The loot you get from ToB is worthless here apart from unique drops where as on OSRS you would be making millions of gp off of the herbs,runes, rune items, battlestaves etc. Plenty of things on here aren't even remotely similar to OSRS regardless.
It can take over an hour to find a team because no one simply wants to do it knowing they wont get any loot.
Buffing the rates won't crash the items. Raids 1 was buffed and you don't see the tbow going for 1b. Not to mention no one really grinds tob and half the server are ironmen. The common items might decrease slightly.
Simply put, ToB is end game content and should be rewarding. With half the players having a 100+ dry streak that's not simply "rng" something is broken on the loot table. if you go 50 dry or roll a drop you don't want that's "bad rng".
Would be nice to hear input from the other raiders who have experienced a lot of tob and see how the rates work.