Yes, the combo funcitons are not ready yet and therefore greyed out.
The Effect Button I-IIII assignments, which are virtually available at the Player and can be triggered via built-in buttons or MIDI, are also not complete yet. The Player applies these if Rigs from other models get imported, but you cannot freely assign these yet. It takes an assignment function in the Editor to for example assign Freeze of the REV module to Effect Button II. So far you can only assign FX 1 and/or FX 2 to an Effect Button at the Player hardware. Example: You have used the Editor to assign module A to FX 1 and module DLY to FX 2 and stored this in your Rig. If your foot switch 2 is still configured as Effect Button I (default), you could now press the button of FX 1 and foot switch 2 simultanously and that foot switch will toggle module A on/off in that Rig. You could add FX 2 by holding its button and foot switch 2 simultaneously. Now foot switch 2 will toggle module A and DLY either in sync or inversely depending on their current state - like an Effect Button at a Remote/Stage would do. But this is not the full capacity of the EFfect Buttons,. which is planned for the new future.