You don't have to take steroids to get big and strong. The average player today is taller and weighs more than the average player in the year 2000 when scoring reached it's peak. If size and strength were the major reason for elevated scoring and home run rates then why are those rates lower now even though the players are bigger and stronger?
Most of the players busted for PEDs through the years were not powerful sluggers by any means. Many of the best home run hitters during the Steroids Era were not believed to have taken steroids -- Ken Griffey Jr., Frank Thomas, Adam Dunn and many more.
I believe steroids were a scourge on baseball and harmed the game a lot and the cheaters should have been punished, but I don't believe steroids had nearly as much impact on the game of baseball as many people do. If we blame steroids for all the higher scoring rates then we will fail to see and appreciate all the sweeping changes that came into baseball over the same period and were the true reasons why the game is so much different today than it was in the last century.
So... the 50 HR mark was reached 21 times in 77 years after the 1st time. Then in the next 12 years it was reached 19 times. It has happened only twice since 2007.
Small market fan... always hoping, but never expecting.
Additionally, it is important to understand that WAR is an ever-changing beast and that it (obviously) wasn't around in 1979. Another interesting thought is how WAR might appear today if it was developed 20 years earlier than it was, and maybe a metric from that era directly translated into a statistical analysis of its time rather than one from a generation later.
As we gain more information about the sport and what correlates to what, I think that speed, given the era that we are currently in, might be a more valuable tool than others and that folks who are average with plus speed might be a more desirable part than folks who are average with plus power.
And I swear I'm not knocking you at all, it's just that we won't know for sure how his speed will play until he is actually in the bigs.