It depends on what your aims are basically, some managers will try and win one competition in a preference for another competition, I remember I disliked the RR Cup idea when it first came out, but I still won the Cup in the 4th season of the "RR Cup Era"
The format change was for the better, the competition makes more sense than "L1 vs L25" and only long term veterans now will remember the old cup format very well. Although many players still think its unfair, there is no perfect way of creating a good cup format that pleases everyone.