but you can't Daze because Overwhelming Impact is optional and thus requires a decision on the part of the attacker (which is a No Action, but still in game terms an action... and the dominator again gets one chosen action only).
Something cannot be a No Action, and still be an action. That makes this interpretation illogical, and self-contradictory. If it is a No Action, it is NOT an action. If it is an action, it cannot be a No Action. Things that do not take up actions are NOT ACTIONS.
Secondly, dominated allows the use of game features provided they are not free actions, and they are at-will. All three of those feats are.
The feats involved are not free actions, they are not encounter-usage, nor daily-usage, and therefore dominated explicitly permits their usage as part of the . Choices about their execution are made by the dominator.
The caveat here is that such game features must be part of the action invoked by the dominator. Because they are all part of the attack made, yes, they can all apply, and yes, the dominator can choose to activate them, just like any other decision inherent in that action. If the feats instead said 'as a free action...' or 'take an additional standard action' or any declaration of a second action then they could not be used. They are NOT a second action however, and therefore dominated cannot be excluded from them.
Because those actions are not inherent in the MBA and are a choice the PC can make, the dominator doesn't get them (and technically the PC couldn't even choose to activate them while dominated, they can't take actions).
Dominated checks: Are they game elements? (Check) Are they usable at-will? (Check) Are they part of the action invoked? (Check, the creature is using an MBA, and therefore they apply. No rule exists to contradict their applying, therefore they are part of the action. They do not need to be written into the power, any more than the dominated creature's strength bonus has to be. The only things the dominator aren't permitted to decide are free actions, and game elements outside that single action)
The dominated condition does not change the dominated creature from being a teammate to not being a teammate. It won't change allies to enemies or enemies to allies. This sort of decision is not entirely in the hands of the dominator, and it does not qualify under the 'one action per turn' rule. This is not a decision decided on an action-per-action basis, or unilaterally.