1. Multi-city makes you input your ground travel. A better model is just to allow From/To, From/To, From/To, etc. instead of From/To/To/To/To...
2. Showing flight upgrade eligibility is inconsistent.
3. Even though we may ask for up to 20 flights to be displayed by schedule, we often have to know flight time and enter it to get certain flights to show up. A search by schedule should show all flights available.