Wow I feel like I watched a completely different show than you all.
Tori Higginson is my benchmark for bad acting. She seems to be completely at a loss for most of her lines and the scripts seem to reflect that.
Weir (quietly): We should do this.
Shepherd: We can't do that because blah blah blah we should do this instead.
That was in just about every episode. Sometimes more than once.
It was such a shock when Carter took over, actual facial expressions and liveliness of lines delivery.
I did feel some pangs over Weir's fate, but it wasn't thanks to the acting.