If more hoteling workers are coming into the main office, it could be worth checking to see the role that services play in their decision to come back in. Also check the usability of alternative office spaces from the standpoint of someone just arriving for the first time. When groups randomly gather, noise may be an issue. Workers may need to be reminded about keeping their voices and equipment noise levels down so they don't interrupt others. Spaces may also need to be reviewed for acoustic support quality to make sure white noise, ceiling tile, carpet, panels etc. are all working together effectively.
Workers are individuals, with individual needs, methods and preferences.
The goal of a business is to meet its objectives, so accommodating work in ways that are most effective for individuals, the groups in which they have membership and ultimately the business as a whole is a critical responsibility. The odds of a first-pass effort at hoteling, or any alternative office concept, being immediately perfect are slim. Evolving work groups and projects may also be forcing changes in the original program, regardless of how successful it may have been. Watch closely, and listen to workers using these experimental work styles. See where they need them to go.