I had a helpful response from support (a while ago now!) and they answered my questions.
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As mentioned, LFO 1 assignable via direct parameter mapping was planned but is as yet unimplemented.
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DDS 2 Pulse Width is modulated via the dedicated controls and not the modulation matrix.
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Inability to play over the sequencer is a known bug that should be fixed in the next firmware update.
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Wave morphing more or less corresponds to crossfading. I seem to remember stumbling across something a little more interesting (definitely more morph than fade) when looking into phase modulation but I’ll get back to them on this.
In other news, unfortunately I think I have the same problem as that described in this thread: Gemini makes random notes / crackling noises / blinking buttons after few minutes after start and freezes which the author states is a hardware issue, but I am confident in U.D.O. being able to sort this out. The sound of this thing makes me believe we can sort out anything, sometimes 