Of course the platoon won't match prime Bird (does that even exist if you only have like 300 career ABs?). But the offense is stacked enough to absorb one of our top 4 hitters going down. I mean the offense was top 3 last year without Bird for most of the year. And is still better than last year without Bird:
Holliday vs Stanton (no comparison needed)
Castro vs Wade (Castro was definitely a better hitter but Wade is a lot better fielder with hitting upside)
Headley vs Drury (Headley had his moments last year, but was mostly a singles hitter. Drury should be a noticeable upgrade)
Carter vs Walker/Austin (Carter was trash. 50 year old Jason Giambi would've been an upgrade over him)
So yeah, if we could mash with those guys last year.. we should still mash this year. Plus some.