Board Thread:Game Discussion/@comment-11132156-20130621175136/@comment-10726652-20130621220805

For starters, the event isn't active yet so the Recommend won't add faction bonus as there currently is no faction bonus.

Once the faction bonus is active the Recommend button *usually* will pick out the highest deck power, and if this involves filling your deck with full Autobots then it will do it.

The Recommend button has however been known to have hiccups, and also even if it does get it right it might not be the best option as Pinpointer has said - as there is at least a very heavy emphasis given to Attack over Defence and Health.