melee combat is the bane of an illithid, and an illithid that waits to shock before running is not very likely to escape unless they are quite skilled at escaping. Being drained leaves them with such a rapid move drain that its amazing you get two zones before your stuck standing with your thumb in your butt.
This change doesn't change that.
Yes, a necromancer can stand in combat behind his zombies after shock. And yes it is a tool of the race that is very useful. But any illithid that does so when their opponent is anything but awful condition is going to get pasted.
This also wouldn't make you more or less survivable if that were true.
The longer an illithid remains the more chance it has of being pasted or caugfht with no moves while retreating.
This change actually makes illithid more survivable in this regard, since there is no reason at all for them to stay.
Loss of zombies? please. your insane, this would mean that, for example, in cabal warfare an ill/necro might as well log out when it goes into shock...as the loss of its zombies means it cant kill squat or offset melee attacks with rescue/flee tactics. And while its raising zombies dealing with the day long (or three day long) timer on strength damned the enemy will rip either the illithid or its altar apart.
This is what happens to all other necro's/class's pets when hit zero hp. A drow necro would be zombieless AND dead/eqless in the same situation.
It gives a nigh defensless melee type the ability to absorb a little more damage and shock helps in allowing a necromancer to AVOID what you are SUGGESTING.
Is shock here to save the necro or to save the zombies? I'm willing to argue the former...
And hey, if an illithid goes into shock...and chooses to use those last few ingots of health to recite scrolls of decapitation at you..then thats their choice. They risk death by doing so.
Like I said in my last post, shock should be an avenue of escape, not a calculated risk for maybe killing them. It should be more of "maybe surviving".