That was my impression from the series. There were 3 of them(assuming Bob goes with her canon origins without tweaking) and the other two went to war with her and managed to depose her and sealed her because she was batsh*t crazy. I thought(I can no longer recall where I saw this) that she was -never- supposed to wake up. Ben was meant to live and die and take Glory with him. But... she was so powerful that the sealing didn't work and she start pushing out. Even so, she was terribly restricted/limited? That much I remember. At full power, or anywhere close, she would have squashed Buffy like a bug. As it was, she was just stronger and more durable than -anything- else, period. Though going a round with Willow, then Buffy, followed by getting hit by a 18 wheeler was more dmg than she could take and stay in control. As it was, she could manifest a fraction of herself, but once it took more damage, she reverted to Ben.
Interestingly enough, the fight with Willow, followed by getting hit by the tractor trailer, forced her back to Ben, but did no dmg to him. Her final fight with Buffy... the wrecking ball, plus Buffy smashing her face in with the troll's hammer... pretty much wrecked Ben when Glory retreated. So, Buffy + TrollHammer + Wrecking Ball = more dmg than a fast moving 18 wheeler?
/random rambling
"This hand of mine glows with an awesome power. Its burning grip tells me to defeat you....
Shining FINGER!" -Domon Kashuu, Mobile Fighter G Gundam
Interestingly enough, the fight with Willow, followed by getting hit by the tractor trailer, forced her back to Ben, but did no dmg to him. Her final fight with Buffy... the wrecking ball, plus Buffy smashing her face in with the troll's hammer... pretty much wrecked Ben when Glory retreated. So, Buffy + TrollHammer + Wrecking Ball = more dmg than a fast moving 18 wheeler?
/random rambling
"This hand of mine glows with an awesome power. Its burning grip tells me to defeat you....
Shining FINGER!" -Domon Kashuu, Mobile Fighter G Gundam