The simplest answer, no - the custom presentation is the only way.
Ask your question on this thread: Custom Capability and CLI Developer Preview - Developer Programs / Tutorials - SmartThings Community There’s a lot of people helping folks through this kind of customization.
That said, note that the DTH for Aeon Multisensor 6 is currently a default DTH provided by Samsung and is in fact local operation capable… Which means when the dev team releases local automations to the masses, you can use this device in a local execution automation. Now, if you create a copy of the DTH so you can customize it with a presentation - that’s now a custom DTH and will no longer be eligible for local operations.
So the question you need to ask, what’s more important - a custom button or local operation? For me I rarely actually use the app to control anything so i know what my answer is. Your mileage may vary.