Before you go an change rules around you should make sure you are doing them correctly.
1) The beast acts through the Rangers actions. They don't get two standards. The Ranger uses the attack powers with best keyword to have the creature attack. That is the rangers standard action. If he wishes to move the creature, he uses his move action. He will even use his immediate interrupts to have the beast opportunity attack.
The damage output of predator strike, + the beast strength and the rangers wisdom can be quite high for an at will. So if you had a wolf it would 1d8+2+rangers will mod AND a +2(Wolfs wis mod) should it have combat advantage against a target. Wisdom is very important for a Beast master ranger.
2) The beast or the ranger may use hunters quarry but the damage is applied only once per round.
3) the beast is treated as an ally so a warlords Commander strike can be used with it.
If you feel that the beast is just not as powerful than, say twin strike, that is because twin strike is so good. Certainly better than careful strike. The beast is also using the same rules as for mounts, which require the player to use his own actions to have the creature move or attack. But the beast is nothing like animal companions in 3.5 which could easily be exploited.
If you start giving the beast independent actions, you just created a new member of the party who should alter the level of encounters.