1. Difficulty in getting international business/first upgrades (much less awards) on days and routes you want them even if you call 11 months ahead of time and even if you pay for a more expensive base ticket

2. Inconsistent CSR information or inaccurate information given out by CSRs with a tone of confidence and authority

3. Having to carefully and repeatedly track your miles because inevitably something you've earned isn't going to get posted without a fuss

4. If more people earn more FF miles, your miles become worth less