As a description of the next music director of an

As a description of the next music director of an orchestra that has hitherto been led by musicians like Gustav Mahler and Pierre Boulez ,that seems likely to have struck at least some Times readers as faint praise .

这句话
,that seems likely to have struck at least some Times readers as faint praise .
不懂，解释一下
详细点

前面的As开始到Boulez都是状语，that开始才是主句as后面应该作为宾补