re: Telharmonic - I haven’t had mine tremendously long, but patching the other outputs into the FM in usually makes for interest. I also use that noise source a lot. It’s currently my only noise, so it’s handy to have!
I find the module makes great electric guitar paletted sounds.
Maybe goes without saying, but read the manual well? There are lots of good notes in there. I still refer to it frequently for ideas.
I’ve found sequencing it outside of “Unison” a bit tricky trmyself. Still getting to know it that way. As @jamescigler noted, it’s much deeper than it looks. That said, it’s also easy to use use from a “make dope sound fast” perspective, as it only has two controls and a gate that shape the different outputs. It’s also quite expressive. Here’s my favorite little sequence I’ve done with it (TSNM playing the Telharmonic).
On a different subject, I finally started using the Morphagene as two mono channels. For some reason my brain was thinking of it like a reverb that smears the channels together, so I always kind of presumed the second channel wouldn’t be of much use… but you really have two Morphagenes in one in a sense? You’ll get identical manupulations of course, but it’s still neat. Don’t overlook this like I did! 
Also, the firmware update that added the “only record the live input” option has really given the module new life for me. Leaving it doing SOS mode but only messing with the live input turns it into more of an effects processor, and it’s a super dope way to use it.