The following Engineer skills have been missing from API:2/skills for quite some time: 14485, 14488, 14489, 14556, and 14490.
Missing is the skill for Healing Elixir (probably one of the above listed ids.) Also missing from the API is the Toolbelt skill for Scrapper Sneak Gyro.
The transform skills for Elixir X have always been missing the berserker mode skills and are missing the new slot #4 and 5 skills. And missing, for quite some time from the API, are the bundle skills for Grenade Kit, Tool Kit, Elixir Gun, and Bomb Kit.
The original [WvW] guild
Fergusons Crossing Invader
http://gw2command.com