Maybe the main thing I've been working on is getting better about using Ableton's native tools to fill in roles that I've used plug-ins for in the past. If you're clever (or watch YouTube tutorials), you can build a de-esser from just a handful of native modules, make a fat synth from scratch, or get that rich af guitar tone, it goes on and on. I've also been trying to spice up my mixing approach while simultaneously reducing processing latency, which is the underlying motivation for using native modules, too.
Also been re-examining the process I use to write chord progressions. Still trying to find that sweet spot of "technical but accessible". I just keep writing new stuff without ever finishing a song. Apparently I'm more interested in honing my ability to initiate and explore songwriting directions than making finished products, for now.
It's all that, but I'm working on improving technical playing skills, too. On every instrument. :|