I thought the pre-1955 Holy Week was pretty good, no? Is that what "54" means? Why the change in terms?
Probably just for convenience or catchiness. 54 = “pre-55”. Even though the new Easter Vigil was published in 1951 (ad experimentum, I think).
Since reading the prayers and ceremonies of Holy Week in a 1945 St. Andrew's missal last year, I can't imagine myself going again to the “reformed” ceremonies, which I cringe just thinking about. So I'm very grateful that our chapel is having the entire Holy Week in the pre-55 rite this year, I really hope we don't go “back” to the newer one in the years ahead.
Also, having served the Novus Ordo for years before coming to Tradition, I and many like me can tell you how the 1955 Holy Week is basically the same as the Novus Ordo Holy Week, especially on Palm Sunday, Good Friday and Holy Saturday. They feel equally awkward and unpleasant to serve.