Beta - What in the name of the great old ones are you on about? Your dude took one look at the mecha and decided the only way to defeat it was to kill himself. I decide to sacrifice my mecha (which Edmund is very capable of fighting without) to mash you, and you guys question the tactical value of it? A move that meant a safe and rapid escape. Are you serious? 

So let's get it straight; 

Ysolda's wants to kill herself to destroy the mecha = Ok. 
The mecha self-destructs after it's driver escapes = Lawlmakesnosense. 

Huh. Well, as long as we're on the same page.