Unfortunately, if you replace the keyboard on iOS you lose the quick dictation key because Apple doesn't let the third party keyboard initiate dictation.
Speaking of dictation, Windows is finally going to bring a dictation key to their virtual keyboard this fall so I'll probably switch from iPad to Windows for my tablet needs. I really hate all of the web browsers on iOS and Android.
Indeed Apple tying 3D touch to cursor control on the iPhones makes me resent it more because they then removed the feature from the iPhones without 3D Touch.
Or, more accurately, "that's orthogonal".
But the reason the iPads have it without 3D touch is because they have much larger screen estate (and also because they lack 3D touch).
People complain about iOS not being for 'power users', but when they add features in like a secondary click or more fine-grained control, people complain about it not being obvious. How obvious is right clicking on a computer to bring up special features?
Well considering that most mice have 2 or 3 obvious physical buttons I would say the right-click on a mouse is pretty obvious. It has also be deeply ingrained in every Windows user since Windows 3.11 (maybe earlier?)