Yes, of course.
Precise customization options will be implemented for all combat jobs as we move closer to complete level 70 support. You will be able to create presets for different playstyles and party compositions.
As we already mentioned, the ability to customize rotations requires an additional layer on top of the basic functionality. The source code is currently undergoing constant modifications, so implementing any kind of customization at this stage might potentially result in a very unstable system.
But we understand the demand and we assure you that new Combat features remain our topmost priority.
Please keep an eye on the main beta thread for updates: [Beta] Combat
Thank you for your request!