Health insurance should be individual, portable across jobs, states and providers; lifelong and guaranteed-renewable, meaning you have the right to continue with no unexpected increase in premiums if you get sick. Insurance should protect wealth against large, unforeseen, necessary expenses, rather than be a wildly inefficient payment plan for routine expenses.
Rather than a mandate for employer-based groups, we should transition to fully individual-based health insurance. Allow national individual insurance offered and sold to anyone, anywhere, without the tangled mess of state mandates and regulations. Allow employers to contribute to individual insurance at least on an even basis with group plans. Current group plans can convert to individual plans, at once or as people leave. Since all members in a group convert, there is no adverse selection of sicker people.