Well, stuff like going mental with scales and step lenghts of tracks, plocking the arps, throwing in LFO controlled chaos into the arp settings, trigless locking arp/scale/lfo settings, multiplexing all this into a signle MIDI output channel from several tracks. Use one track for some note data, another for contasting note data, yet another for CCs, all having diff. scales and lenghts… you get the idea Obviously this fun is increased greatly if you are controlling something over MIDI which also responds to CC.
Some of the most wonky, royally skrewed patterns I have ever made have resulted from having too much free time messing with the OT MIDI tracks. I can add so much MIDI sauce that I will have no fn clue as on what the result will sound like, no matter how hard I tried!
Some people have said that having the OT as a MIDI seq equals having thousands worth of exotic sequencing modules in modular world? I can kinda understand how that could be the case.