Well, Ophelia requires microing not one or two creatures like Wildsoul and Warbeast but a whole bunch of them. She still has quite crappy skills overall and is pretty awful, so the only reason to choose her is the skimpy outfit:
Scout has a low win ratio as well - most people play him in a very, very wrong way - his main role should basically be providing his team with map awareness (Electric Eyes and roaming with Vanish) and pushing lanes when nobody's paying attention. After that he CAN become a late game carry but most people die so much with him because of the "OMG I'm Rambo" factor and wrong item/skill builds that they won't get anywhere and piss their team off with kill steals.
P.S. Tip for epic winnage with Wildsoul - Ctrl+1 you and your bear, Ctrl+2 you, Ctrl+3 bear. BooBoo absolutely RAPES squishy heroes early and mid game if you put the right equipment on him while Wildsoul becomes one of the most epic and unkillable AGI carries late game. When I last played with some of my American buddies we had a lot of lulz since one of them took Wildsoul and in his own words "wouldn't ever play another hero again". We also had lots of "proc Bear, proc!" shouts on Ventrilo, since BooBoo has this passive ability that can root people in place for 3 (!) seconds, which is an epic ganking skill. ^^