I love the SSP and I think it still has so much potential.
I think if the sequencer was redesigned it would vastly increase the effectiveness of selling and using this module. It has more then enough computing power to be a powerhouse of a sequencer.
First, what if the sequencer was somehow integrated into the record menu, or in the same way as the record menu have a separate tab for the sequencer. It should be easy to move back and forth from the sequencer to the other modules.
Second I think the whole GUI of the sequencer should be redesigned to be more easily programmable and musical looking. With proper sequencer transport controls and musical values to the sequence (note increments and rhythmic increments).
Third there should be multiple windows in the sequencer. A single track and multitrack. Where each window has different paramaters. There should be less steps at first as well and then be able to increase by increments and chain together sequences. A well there should be easily clocking integrated.
I also think there should be a shortcut approach taken to it for example like from the JJOS for MPC. There are a lot of buttons on the Percussa and it seems like wasted space to not make use of all of them.
Im sure there are other ideas as well.