I would be very helpfull to have a bulk assign function, in order to assign multiple resources to a specific task/tasks. For example by selecting a (resource) group of resources and assigning them to one specific task. This is very common business scenario, especially with big projects with a large project team and internal projects.
In addition to the assignment of multiple resources to one (ore more) task(s), an option to specify the pattern would be perfect. Because now split hours should be managed via the resource assignement control, which is less user-friendly.