Why was Lepidus so weak compared with Octavian and Anthony?

To give some idea of his place in Roman chronology, Marcus Aemilius Lepidus was about a decade younger than Gaius Julius Caesar, half a decade older than Mark Antony and about twenty-five years older than Gaius Octavius (subsequently Augustus, commonly called "Octavian"). read more

However, Octavian and Antony scored a decisive victory at the Battle of Philippi, in so doing, gaining quite a bit of glory. Lepidus looked like the boring duffer who stayed at home whilst Octavian and Antony did the work, and he'd given up most of his legions - and therefore his power - to get that far. read more

Lepidus' appointment reads to me, whether Antony was the one pulling the strings or not, to be essentially a symbolic gesture of wresting power away from the senate and Caesar's will and placing it firmly into the hands of Antony's group of Caesarians. read more