The D-pad on my tablet is big and somewhat unresponsive.

what tablet model are you on?
Also how did you get the water on that pic?

I'm using an HP touchpad and I used this app. https://play.google.com/store/apps/details?id=net.zhuoweizhang.pocketinveditor&hl=en

Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.

Updated. And yes this is still a problem.

Updated.
And yes this is still a problem.

Can you resize it inside the options menu to make it smaller?

I am experiencing this in v0.7.1 on an iPhone 3GS. I resized the D-Pad to make it larger. The result was a pad that took up the entire display. I could not get to the options to scale it down, because the D-Pad covered the button - so it just caused my character to move to the side. This has made the game completely unplayable (beyond movement) for several weeks

D-Pad covering screen and option buttons

You can access this options while not in the game. We need a way to fix this permanently though. :/

Cleaning up all the old issues - please reply if this affects 0.9.3.