You may bash the UCI all you want, but I think this instance shows that they're learning. The complaints were justified, as teams do, or thought they would still, depend on the ranking system, so plan their season and fill their team accordingly. It's a great sign that the UCI admitted their ill timing and postponed the change. They've actually listened to the teams, in this instance. (Although, admittedly, probably too late in the process. Keep learning, UCI.)
I don't think the main concerns were for the system itself, although some were, but for the late announcement of it.