Nice!
Like @Kurzaa I think you're already pretty high on the feature list for a low end board. Not much more and you can simply copy the Duet.
A few words about what I observed about people's recognition over the years:
If you also offer a StepStick derivate with digital current control, people will likely recognize these derivates are required. The fact that Gen7 Opto Endstops exist makes most people thinking Gen7 requires Opto Endstops. Of course it doesn't, mechanical endstops work just as fine as on any other controller. With this in mind I'd stick to the pure Pololu form factor for the stepper drivers which is pretty much an industry standard now.
Interestingly, years back many many people considered a $150 RAMPS & Arduino to be a better value than a $90 Sanguinololu or Gen7. "If I burn out my ATmega I can simply replace the Arduino". Totally ignoring the fact you can replace just the chip easily for $8 on the other controllers. This (odd) recognition made much of the success of RAMPS.
Visual appearance is more important than technical facts. These large silkscreen logos on the back or similar. 4pi is recognized as "the controller with an entirely flat back". RepRapDiscount makes all its boards white (second silkscreen covering the whole board), for a more friendly appearance. Asking a friend with an artistic mind to put something nice, unique onto the board is likely a good idea.
From the Open Source perspective: doing the design in gEDA or KiCAD would be awesome. Both are entirely sufficient for such tasks and KiCAD is currently on a steep rise: [reprap.org]
Like @Kurzaa I think you're already pretty high on the feature list for a low end board. Not much more and you can simply copy the Duet.
A few words about what I observed about people's recognition over the years:
If you also offer a StepStick derivate with digital current control, people will likely recognize these derivates are required. The fact that Gen7 Opto Endstops exist makes most people thinking Gen7 requires Opto Endstops. Of course it doesn't, mechanical endstops work just as fine as on any other controller. With this in mind I'd stick to the pure Pololu form factor for the stepper drivers which is pretty much an industry standard now.
Interestingly, years back many many people considered a $150 RAMPS & Arduino to be a better value than a $90 Sanguinololu or Gen7. "If I burn out my ATmega I can simply replace the Arduino". Totally ignoring the fact you can replace just the chip easily for $8 on the other controllers. This (odd) recognition made much of the success of RAMPS.
Visual appearance is more important than technical facts. These large silkscreen logos on the back or similar. 4pi is recognized as "the controller with an entirely flat back". RepRapDiscount makes all its boards white (second silkscreen covering the whole board), for a more friendly appearance. Asking a friend with an artistic mind to put something nice, unique onto the board is likely a good idea.
From the Open Source perspective: doing the design in gEDA or KiCAD would be awesome. Both are entirely sufficient for such tasks and KiCAD is currently on a steep rise: [reprap.org]