Charles Isherwood reviews 5 plays. He gives kudos to the comedies “Although it can often be trying in less experienced hands, Shakespearean comedy tends to flourish at Stratford, in part because it is often entrusted to veterans like Mr. Dow and Mr. Davies.” The Winter’s Tale: “Only the fine playing of Seana McKenna…and the wonderfully natural Brian Tree, in two small roles, stood out.”