Whether the sprag alone(which appears intact/didn't get rolled) held, or if the low/rev band held the drum, it would have -0- bearing on smoking the clutch. The higher ratio lever only increases the clamping force on the band, it has nothing to do with clutch apply whatsoever.
And the kickdown/2nd gear band lever You are picturing won't do anything whatsoever in 1st/manual low, & the most common reason THAT band gets smoked is shifting
@RPM from manual low, because the L/R band can't release fast enough before the KD/2nd band tries to grab the front drum. Even with an improved lever ratio, any overlap is won by the band that already has a grip on a motionless drum, that's the L/R band, so the kickdown band is always the loser.
The torn up alum. part is the "support", and if there's a lack of lube or improper assy./repair, it will be damaged, seals leak, pieces of debri clog fluid ports/passages, etc. The lever does -0- to address the damage I see, nor does it explain it.
