Number47 said:
This actually would've had some real consequences in the first round. If the grapplers were occupying the same space (per grappling rules), then the attacks on Marius would've had a 50/50 chance of targetting Blaster instead.
The real consequence on the 1st round would have been that Marius wouldn't have gotten out of the AMF, and not been healed (and be soon dead, natch).
But I didn't realize that until seasong had already done all the great work on the god's commentaries, so we just have to decide what to do for later rounds.
[my opinion]
I feel we should do it by the rules.
And the rules clearly (IMO) state that when you grapple and Hold, there is a Move in phase where there is 5' of movement by the grappler.
Normal movement rules do not apply to this 5' slide, since if they did, there's a huge rules hole and no grapple could ever take place. That is most likely not what the designers intended.
After provoking an AoO, requiring a successful grab attack, then requiring a successful opposed grapple check, I guess they're saying 5' of movement isn't out of hand. Interesting that the 5' movement is outside of the normal movement parameters, but having the combatants be in the same square for grappling makes classic sense to me.
I view it as all part of one movement - the charge in, the Trip, the slashes of claws before a Bite which enters into a grapple.
Of course, with Improved Grab, the defender gets pulled into the grappler's square... which similarly could violate the movement restrictions on the defender that turn (i.e. what if the defender had already 5' moved in a full attack that turn?)