When rating careers, most folks will favor a high peak over a steady rate of accrual. They say that a fixed sum of value — like, 50 WAR over 10 years — tends to have more pennant impact if it’s unevenly distributed (say, five years of 7 WAR and five years of 3 WAR), rather than doled out as 5 WAR each year.
That view has intuitive backing. Whereas WAR is gauged against a replacement-level player, the average player is a more relevant value if you’re trying to build a contending team. If you swap Mike Trout’s 2013 value for that of Jay Bruce and Ben Zobrist, you gain WAR (10.2 to 9.2), but you lose Wins Above Average (5.8 to 7.0) — and you have one less lineup spot from which to build back that WAA.
I can’t quite refute that position, but I do have a soft spot for steady, Lou Whitaker types. (You noticed?) So I wonder how far that intuitive logic is borne out empirically, by actual pennants and championships.