I guess you know about the key tracking on the digital filter… it’s not analog though 
So you’re left with p-locking the FX filter cutoff, which is pretty tedious.
About using sysex versus Elektron’s proprietary formats to dump data. I’ve been meaning to address this and add some info in the original post. But I must admit I’m not entirely sure about all the differences. Here’s an attempt at a small write-up. Please correct me if I’ve gotten some of the details wrong, and please add any useful info:
With sysex you can transmit/receive OS files, projects and patterns. You’ll need a sysex tool. Elektron used to offer C6 for this, which was very easy to use. I don’t think it’s available anymore, though you may find it in some old buried corner on elektron.se. There are other alternatives. You can use either the MIDI port or the USB port for sysex. (I’ll add a link if I can find it)
With the proprietary format you can transmit/receive OS files, projects and sounds. You’re locked to using Transfer. Personally I find it very easy to use. You’ll need to use USB as far as I know.
The main drawback to dumping only patterns is that any sound locks will be lost.