Good point.
Through April and May last year, the team scored 308 runs. This year, they've scored 252 runs through April and May.
Through April and May last year, the pitching staff allowed 228 runs. This year, they've allowed 218 runs through April and May. That is slightly better, but it's not the improvement that I think we would expect with the addition of Sale.
That said, the drop off in runs scored is also more than I would have expected.