I've started and stopped trying to put together a reply to this several times, and I'm not really any closer to anything coherent.
The bottom line is that I have historically liked Fontaine as an MLA. I think her concern - obstructed sightlines from the stage - is understandable.
But I can't fathom expressing those frustrations in that manner. There's really no excuse. Whether that's worth a resignation...I don't know. I wouldn't be mad if she stepped down, but I'm also not necessarily mad that she hasn't. I guess time will tell whether she learned anything.