My first impression is that it could dilute your original message. TI can offer a physical challenge and psychological sustenance, does it really need to offer what could be interpreted as condescending lifestyle advice? My guess is that a large proportion of swimmers already embrace a healthy lifestyle.
Perhaps you could issue a 'TI International Race Club' cap to each member of the new site, where there could be a page where people could post results from races and triathlon, and leave comments or let a pattern emerge of improved results from TI practice. A distinctive cap worn by swimmers would allow anybody caught in the swimmers wake to see what technique is being used and they could perhaps be future customers. It would certainly raise your profile if there was conformity in the TI community.