I think this is because LOmixkrow DOES need a lot of support. Without a scout like chou or foo, it will really struggle to get in. @prem's list, in most of your examples, you'll have one shot at brave bird before the recoil plus the SR damage kills you off, so if the opponent has a flying resist or something that can survive a BB, murkrow still hasn't payed off it's "automatic kill". Spin support is also very important if you want it to function throughout the match as a revenge-killer. Also, while subroostkrow is good, it's not that difficult to deal with for most teams. Murkrow really can't do everything on its own. It's really good on paper and if you can give it that support, but I think we are over-looking that murkrow really does need that support to do its job.