I love the built-in support for hiccup syntax in freagent. I also noticed a request for an extension to hiccup in the Reagent project that looked really cool and might be as useful in freagent. Have you seen it? Here are the relevant links:
reagent-project/reagent#142
reagent-project/reagent#149
The pull request is a very small diff, so I thought it might be easy to do in freagent as well.