yes i know it might seem like a dumb request, but:
prior to patch 5.1 the "Rapid Maneuver" ability only had those yellow glowing lines as a visual effect.
currently on live you've also added a weapon glow visual effect.

I have a couple of problems with this change:
1. since i like to play the game without addons or buff timers (i'm a minimalist), i tend to use the visual effects as an indicator for when i have the buffs "Major brutality" and "Major sorcery", this visual effect overrides this, and i have no idea when these said buffs are active (they also appear as "white" glowing weapons)
2. this visual effect last for the whole 30 seconds of the "Major Gallop" portion, making it extremely long..

one change i would suggest that will benefit everyone is this:
the glowy yellow lines worked well enough for the last few years as an indicator for the major gallop buff, and there is no reason to add a weapon glow effect on top of it.
HOWEVER: since you have changed the skill to add Major\Minor expedition for the first 8 seconds of the buff, a cool solution will be to leave the "White" weapon glow for the first 8 seconds of the duration, it will let us know when these buffs drop off, then the ability can go on for the rest of it's remaining 22 seconds (major gallop) with the glowing yellow lines alone.
this will assist us in recasting the ability to renew the Major\Minor expedition buff (if this is the buff we are interested in - like in a trial setting for example)

hope you take my proposal into consideration, thanks in advance!