yeah, it's awful. you can power switch while its first charge is on cooldown though, if you were looking for a more reliable jump skill to start a match with or something. i think the best use for it is probobly terrain glitching in pve.
i respecced my gwf to tighten up my feat selections just now, and since any gwf build has 15 or more open power points, i tossed 3 of my leftovers into punishing charge. turns out this power is an order of magnitude better for launching than flourish, im getting sometimes twice the distance with punishing charge on the…
you use flourish right on the edge of a surface that would cause your character to be falling, even if it would be an extremely short fall. this can be either an upward angle, downward angle, or sometimes a flat surface, and each of them will give a different result. it seems likely that flourish's forward momentum is…
jumping update: the tent on the AH platform is great for this, you can jump to/over just about any building you can see. try using mighty leap to get even greater "ups."
after 10 minutes of experimentation i was able to get underneath protector's enclave with this, theres definately potential for nasty terrain abuse here.