I make beats with Patterning on iPad all the time. It's a fantastic sequencing surface. The main advantage over a traditional horizontal sequencer is that time at the measure level is represented much more naturally (as a loop), which makes polyrhythms and track offsets (both common when putting together more interesting sounding, swung beats) easier to visualize and manipulate with confidence. It's also arguably a bit easier to visually reason about symmetry / 'rhyming' across beats, when making step changes - a much more minor improvement but noticeable to me (I'm highly visual).