By the time that blob had time to grow as big as you suggest, I wager that the army facing said blob had the time to get some shamans with paralysis. Giant blob is starting to weep now.
Well, in campaign mode (what I usually play), I need to research it before. Once the RTS starts, I'm stuck with what I have (which is how it should be, imho).
But the paralyze ability has been moved up recently, making it a bit harder to acquire - and honestly, if I have to direct my whole research towards countering one specific quirk of the current RTS-AI, I still think it might be better to reduce the possibility of the AI to do something like that.
