In the past decade, primary care has undergone significant changes toward system improvement, which has improved patient outcomes and reduced costs. Family health teams (FHTs) were introduced in Ontario as part of primary care renewal. FHTs address a lack of capacity and integration among providers and service inaccessibility experienced by the population. We explore, the potential for positive impact of FHTs and the lack of built-in evaluation strategies to assess performance. We provide four suggestions to better support rigorous evaluation of FHTs. This commentary considers Ontario's efforts to improve capacity, quality and evaluation in primary care through FHTs.