I’ve released a separate little app solely for editing the Aion system.cfg file (you can improve video performance through some of the settings there).
There has been no statement however about this, only a couple posts from a clueless forum moderator who’s not even part of the paid staff: http://board.en.aionfreetoplay.com/board23-aion-the-game/board26-general-discussion/2016-is-this-legal/index2.html#post2824 (while he’s actually breaking the ToS himself by using voice packs that don’t belong to the publisher, quite the hypocrisy -.- )
Other posts from a different mod however always said there is no issue with this and they aren’t banning anyone over using the meter.
(Note. some users claim a noticeable performance increase by changing the video_MODEL_CACHE from 3 (default) to 0. I tried it myself but didn’t really notice any change)