If you have time, please do, and if it's usable enough - task DAG, ability to add estimates in durations ("1 week", and not "2019-11-18 to 2019-11-25"), ability to add labels/tags and to search by it, and the ability to display tasks as a graph with critical path highlighted - you'll have your first paying customer right here.

If you ever get around working on this, or even demoing your DAG UI (I'm interested in UIs for DAGs for other reasons too), please shoot me an e-mail (address in my profile).