Most of the apologies from bishops that I have seen  apologize collectively for Catholics (bishops, priests, religious, laity) as you point out.  What I would like to see is a separate apology from bishops for the offences of bishops who repeated transferred abusing priests from parish to parish without any notification to the newly assigned parish or pastor about the abusive character of the priest.  As a lay person, I never witnessed or had knowledge of abuse by a priests, so I do not feel that I personally need to apologize.  I am profoundly sympathetic, however, to those who were abused. Bishops criticize the abusive priests, and somehow  make the laity also responsible in their apology, but seldom isolate and criticize, if ever, past bishops who knowingly protected known abusive priests.