I think we need evidence more than just systematic reviews. Although ranked high in hierarchy of evidence (which is still controversial), majority of systematic reviews are based on clinical trials. Most clinical trials has limitations in study duration due to financial reason and control of attrition. Registry based studies can provide more information on the long-term outcome. Not many interventions' long-term effect (in both western medicine / TM) were demonstrated by systematic reviews.
Please note that Chinese medicine used a measured way since more than 2000 years ago stated clearly in the Treatise of Cold. Measured in diagnosis with patient reported outcomes and measured in prescription with decoction and powder. The measured form has not been changed much for the past 2000 years.
HIFA profile: Chris received training in basic science, biomedical science, clinical Chinese medicine and public health from the University of Hong Kong, Hong Kong Baptist University and London School of Hygiene & Tropical Medicine. He is currently a research clinician based in Hong Kong and has been actively engaged in clinical medicine, clinical trials, basic science research and qualitative research. He had served for Hospital Authority, World Health Organisation, KPMG Advisory and hospitals on research consultancy, medical administration and clinical medicine in Hong Kong and mainland China before his academic engagement.