Had a chat with our guitarist and the DL32R we have doesn't support the Android app anyway, the DL32S does but not ours which is apparently waiting for a firmware update to enable it. So it looks like even using Bluestacks or an Android tab isn't an option anyway even if they did release Master Fader 5.1 which is very annoying. From looking at Play Store reviews the Android version seems extremely buggy too, kind of annoying when Behringer support most devices.
Kind of expect better support from Mackie really. Guitarist said the DL32R hasn't had a firmware update in over a year, hope they don't abandon it. Ugh, really don't want to buy an Ipad!