I read somewhere Bruce Lee in the beginning was against this idea because he thought this scene was too unrealistic and ridiculous but he finally gave in because Lo Wei presented to him his own side of justisfication. Can't remember what he told Lee.
If Lo had begun directing I think the overall movie will be slightly better than midway through production. Reason being the original script was not good and Lo, like Raymond Chow did not think too highly about the Lee, the new star. So, he only put in maybe 60% of his effort to complete the film. That's my opinion.