The problem is that both hunters and champs tend to be played by people with limited tactical awareness.
How often do you see a champ or hunter get ganked on his own because he did not move with the group? They advanced just a bit to far, chased to long and then the creeps turned and had an easy bit of infamy.
Simply put, NEITHER lore-master, minstrel or hunter are at their best if you wish them to move. These three classes stand STILL.
Charging is the wrong tactic anyway.
WOLF-PACK.
LM/Burglar singles out a target, disables it, rest pounce on it. Regroup to safety.
Charges do NOT work. The game just isn't build for it, go play WARhammer instead.
Why doesn't charging work? Because when you do charge as a group all you have done is surrounded yourself with enemies and which ever way you turn you are in range of 3/4 of their black arrows and reavers all around killing the light armour-classes and wrecking your rear.
DO NOT CHARGE INTO A RAID OF CREEPS.
Creeps don't do this either unless their got fastly superior numbers BUT they got a combat rez that rezzes 5 targets EVERY 5 minutes. They can afford to hurl themselves on a freep raid. Creeps don't have the skills for it and anyway, the tactic is wrong from a game that doesn't have collision detection on players.
The charge in this game is like airborne troops dropping in the middle of an enemy army. Suicide.
If you wish to conduct a charge it must be done like this.
Enemy is disabled with range of healing. Melee rushes in, when melee is on the target all let loose, CC controls who ever comes to the targets aid, switch to next closest BUT stay within range of support who IS NOT MOVING. If there are no more enemie within healing range, retreat back, do NOT chase into a full freep rade.
Extended charges can only happen if you do NOT need support so the support can follow you. But remember they need to be protected, hunters would be nice for this, but who wants to rely for hunters on anything more then to break CC. Assign some champs to beat the shit of any creep who dares to attack the support troops.
Remember that minstrels and lore-masters will be a lot more willing to follow you if they see a champ killing off the warg that killed them.