Senpō branch is to be considered as an bridge, step - between 10.5 and 10.6 version - which is planned for summer. Main objectives are performance increase and size reduction. As in current release and future upcoming releases - those would be hard and long to pinpoint, as are often made in batch and don't show any informative value for reader - this is why less significant changes are always portrayed as an "Other changes, fixes and updates" point in list.