1. The line spacing. It's not defined as baseline to baseline, but as the space inbetween two lines of text. Very difficult for an assignment with a prescribed line height since it usually refers to a baseline-baseline measure. 2. While having multiple columns is really easy, adding floating elements for the text to wrap around seems not possible. There's a reason all these CV templates have the info bar on the right instead of the left.
This issue and others like it are dealbreakers for me. There are numerous related issues, but the developers are stubbornly sticking to their interpretation—using the older definition of leading from the days of metal type, rather than the more modern concept of line-spacing. No other software or modern typesetting system I know of uses this approach anymore. This is particularly frustrating since I work with a lot of multilingual text, including Arabic, and it's very difficult to align the baselines when setting text in more than one column.