I really want them to add support for multi-airport "sfo, smf to hkg" and multi-city "sfo to lax to hkg" to the web search parser.

And the mobile web app is decent but compared to desktop very limited. For example, the dates grid shows just a few days vs. 7x7 for depart and return. I think that's one of the most important features. I find it frustratingly inefficient on mobile.