I think Nick Johnson's a downgrade personally, and he's played 140 games ones, and never broken the 150 barrier, while Johnny Damon has, essentially, never gone under 150 games in his career.
Johnson averages about 100, to Damon's 150, not to mention OPS+ says Damon's an upgrade even without health factors.
Matsui is substantially better in OPS+ than Granderson. Matsui's OPS+ has been around 130, while Granderson has been declining in each of the past few seasons. I don't expect him to continue to decline, but it's a trend nonetheless. I'd say he probably improves on last season, but will he improve to what Matsui did? Doubtful. He plays better defense though, and overall, I guess I'd say it's pretty even.