Leo has the people and has apparently decided that keeping them busy is better than letting them sit around. And, it really does make sense to pull more from the defensin-mimetic portfolio.
In Reply to 'Amatuer17' Nice response - it shows his long term thinking
When you read the response - specially Prurisol - it shows the number of steps and hurdles that need to be addressed before the trial can start - which adds to the delay.
So working on multiple trials at the same time makes sense. However the lack of resources (people and money) may make these tasks much more difficult for Leo.
The Tom guy seems clearly rude and does not have professional courtsey while communicating.