Board Thread:Game Updates/@comment-1820055-20150701022818/@comment-26574811-20150809075839

http://kancolle-news.com/archives/2015_0809_news_kansaiki.html

Just in:

The new aircraft system will let aircrafts have its own levels. High-level aircrafts will have stronger strike power.

Whether this applies to fighters is unknown, current intel only mentioned strike force (anti-ship attack)