They've got a set of 3 clear objectives and their tactics on the ground, e.g.
* prioritizing attrition over the capture of territory.
* avoiding urban fighting where possible (e.g. a multi-year avoidance of zaporizhia and kharkiv).
* minimizing civilian casualties.
Reflect not only the objectives, but the desire to avoid a lot of the "messiness" the author referred to. The fact that Ukrainian civilians fear busification more than drone strikes is a testament to that.
None of the other parties (Ukraine, Hamas, Israel) appear to follow clausewitzian logic, though.