Interesting work, but there's a huge sector they're missing - industrial enzyme and catalysis design. Most of this field is concerned with small molecule binding - methane, carbon dioxide, ammonia, methanol, acetic acid, etc. Binding is often just the first step, as you're typically trying to do highly specific chemistry, e.g. attaching a single oxygen to methane or a single hydrogen to carbon dioxide, etc.

Working in this area might also be good test of their technological approach, as small-molecule binding can be somewhat challenging, and even evolved biological systems can struggle to achieve high specificity.