'Saturday' - Think Big Auto-flower

It has been hotter in here than I intended, reaching highs of near 80-degrees with very low humidity. (We turned on the heater early and this room gets way hotter than the rest of the house.) I really hope we haven't hurt her. She still looks strong. Much less yellowing than the other two, but the buds almost appear stunted. I snapped a pic of some exposed roots. Is this a bad thing? I should also mention that this was initially squeezed into a cabinet too small for the 5 gallon fabric pot--It got smooshed in there pretty good, but a few weeks ago I realized that I had room in my tent for all three plants. Look forward to hearing your thoughts on this one.