It would be useful to allow a list of plans to be selected when creating a reseller user. Currently you can only specify a resource pool which the user can create any size servers from, this can be an issue when allocating resource pool larger than a single piece of hardware. Having separate reseller plans (similar to the current admin plans page) and selecting the plans or plan group when creating a reseller user would be helpful. It would let a reseller create VPS using pre-set plans. This would allow better reseller functionality for some people so they can offer reseller options of their regular plans.
The reseller features could be updated for various things around this, not just a specific plan template. Also the reseller area could be updated to reflect the new theme.