Ok, I am in a hurry, so I will respond more clearly later.
But, here's the main points:
1) The AoO rules are explicit that the 5-foot step only prevents the AoO for movement once per round. This means how often the AoOs protect you per round, not how many times you can take a 5-foot step per round. No matter how many different ways people try to MAKE it mean that, it does not. The AoO rules are totally irrelevant to the conversation with one exception. If you are using the AoO rules to imply one AoO per round, hence, the designers intended one 5-foot step per round, then fine. It does not prove that, but it shows what a given person thinks the designers intent was.
2) Yes, the DMG states that if there is no rule for something, that you should extrapolate based on the known rules. However, the known rules are not totally unclear here. They are just inconsistent here.
The known rules allow:
Hasted: 5-foot move, full round attack, 5-foot move, partial action attack
They do not allow:
Hasted: 5-foot move, full round attack, 5-foot move, open a door
Just because this inconsistency is in the rules does not mean that the rules are unclear. They are clear. They state one 5-foot step per round for an MEA. They do not state one 5-foot step per round for any other type of actions, merely one 5-foot step per ACTION.
Uller said:
Hey KD,
Can you explain the logic behind allowing multiple 5' steps with partial actions, but not MEAs?
It doesn't make sense that that restriction would be expressly put on MEAs and not partial actions when MEAs take a "smaller" amount of time(as in a normal turn can consist of two MEAs or an MEA and a Partial action, but not two Partials). In fact, a partial action can BE an MEA. In that case, does the one-per-round rule apply or not?
Of course it does. It is not a partial, but an MEA. You are replacing your partial with an MEA in this case.
Uller said:
If you can move, ready (trigger) 5' step, drink potion...
Did I say you could do that? None of the actions allow you to both move and take a 5-foot step within the action. Even if you try to break a standard action up into move and readied partial.
The point is, however, you are correct (even though your example was not). It is not logical because it is not consistent.
However, just because it is inconsistent does NOT mean that it is not clear. It means that it is not consistent.