I agree that support for a keyboard should be added at some point, my concern is that features would then get added that are keyboard only per new requests from the users. I think those who are more diverse in CAD would make great use of it. I am certain that more advanced users of other CAD products would make heavy use of keyboard shortcuts. I would hate to see that the mobility side starts to disappear and it starts to require more accessories like a keyboard.
For someone like me who has been tinkering in CAD off and on for about 3 years (more off than on) and is you might say new/beginner at this (just under 4 weeks now) I would prefer to see the interface minimalistic as it is. I think many of the requests are valid thus far, but everyone must keep in mind this is an iPad not a full fledged computer.
Right now the app performs amazing considering the platform as well as what we are able to produce from it, this was unthought of not long ago. I am all for improvements and features, but stability, performance and ease of use should take priority, of course this is just my opinion, I am only one user of many.
Shapr3D has allowed me to accomplish more in less than 4 weeks than I have in 3 years with other products. This is largely due to the current interface and ease of use. In my opinion this will draw in more hobbyists to the product as well as the industry as a whole. The easier a product is to use the more likely it will be the goto product. For me Shapr3D accomplished both ease of use and the ability to create models that perviously I had given up on with other products due to how complicated they were to learn.