With the DLD, just leave it as-is with 4ms's stock panel. It's not difficult to read, so I don't think the expense/hassle of repaneling it makes sense. It's also a pretty control-dense module, so doing the work to get all of the controls, jacks, lights, etc lined up and resecured just seems like a major hassle.
The uClouds is simply a tiny version of the same thing as the Supercell. The Supercell adds more function controls, but at the core both are still the same open-source firmware. Same thing goes for the other smaller MI clones.
As for the sequencer...the ER-102 Sequencer Controller is definitely a must with the ER-101, given that it allows for memory-based control over the ER-101. The 102 has the SD card slot for memories, controls for loop-point changes and grouping loops, opens up new modulation possibilities, and can also do CV recording of things such as joystick, knob, etc gestures. Just as a composing "scratch pad" for grabbing clips for later use, the ER-102 is worth adding; in performance settings, it's damn near indispensable. Of course, there are other complex sequencers out there, though...maybe have a look at Hermod's Squarp, which is sort of a version of their Pyramid sequencer that's been retooled for Eurorack purposes. Something like that would also open up more space, too.