As my secondary fleet, I have mixed results with the drakh. They can excel in some situations, and suck at others, what is a keey indicator is that against a good player with a decent fleet, they suffer badly, the GeG is only useful against the smalest of ships, and bad rolling. Any half decent battleship should punch trough it like tinfoil, especially with the low hull scores.
I do still look at them and ask just how is a GEG of 1, 2, 3 or even 3 making up for Hull 4, even the cruiser with it's hull 5 has such a small crew and damage score, I'm amazed when it survives.
They, Like the Minbari are an "advanced" race ahead of the others (allegedly), but they don't have a fear factor at all, their beams have less range, and in the case of the cruiser, less dice than the minbari counterpart, and their secondary weapons don't offer as much either. When I heard they were to be released I was excited, expecting a truly terryfying race, not uber powerful, but, like the minbari, a fleet people would have to be talented and/or a bit lucky to beat. Instead, I received my book, laughed, thought it was a load of misprints, then laughed again.
They don't need an all emcompasing re-write, the principles of the fleet exist, and make them unique and interesting, they just need some fine tuning.