Before we get into this more, I think we should clarify a bit of terminology. People are using Rally, Regroup and Marshall in ways that aren't clear.
Marshalling is an action that the formation takes. It includes a choice of moving or shooting, followed by a "Regroup".
Regrouping is part of an action, either Marshall or an option under a Hold. It's the "roll 2 dice, take the largest, remove BMs" mechanic.
Rallying is something every formation does in the end phase if it has BMs on it. It is attempted automatically, not as part of an action. Make your roll, remove 1/2 BMs, adjust for Leaders.
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Quote: (mnb @ Dec. 23 2009, 21:46 )
well no one had a problem since raiders came out, until a few days ago, would be a little more accurate
"Losing all BMs" is not the primary issue.  The problem is the overall system causing weird interactions.  "Losing all BMs" was a patch required to treat one of the symptoms of those interactions.  The objections to it revolve around the fact that it's just more weirdness piled onto the mechanic, not that it's some sort of root cause.
Also, I've had a problem with the system since long before Raiders went to press.  I made my peace with it.  However, since it is back on the table, I'm laying it out again.  The same is true for many other people, like hena.
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but if the did not loose BMs, then say you kill 3 units. you would loose all BMs and the formation comes back next turn but slighly less powerful. if you were given a chance to keep BMs and therefor bring units back in the end phase, you combine that w/ a marshal next turn and that same formation comes back on board without a scratch.
That is two regeneration steps - 1 from rallying and 1 from regrouping.  The regeneration overkill was addressed by the "lose all BMs" patch to remove the rally-regeneration.  However, if there were no rally-regen at all, the problem never exists and it doesn't have to be "fixed" with the "lose all BMs" patch.
You're correct that if nothing else changed, allowing Necrons to rally-regenerate while off the board would be insane.  However, that's not the limit of the discussion.  We're talking about
all the problems caused by rally-regen and if there is a way to elegantly fix all of them at once.