Our collaborators noticed that there's quite a bit more aryl-aryl bonds and phenyl rings in molecules than would be ideal. As such, the "Bad Group" objective has been updated to penalize these groups. (See comments for more details.) We've also increased the Compound Library bonus a bit.
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Adding a methylene (CH2) group between the aryl rings should be sufficient to keep it from being classified as an unwanted aryl-aryl group.
The penalties for the aryl-aryl and phenyl groups were deliberately set a bit low for this round, as we don't necessarily want to remove them from consideration completely, we just wanted to encourage people to try other approaches.