You should add a column in License Usage Insights that contains "last seen" or "last logged on" for all users.
The LUI team agrees the ‘last logged in’ (and overall usage patterns per-user, per-month) is valuable context and data to have available.
This is not an immediate priority for LUI but we’ll continue to review and plan for this capability. It is likely this may become first available as a ‘cloud only’ feature when LUI expands to support Citrix Cloud based services.
Daniel LHommedieu (LUI Product Manager)