Peraion Graufalke
First Post
That seems to be the case, near as I can tell. The Essentials books say nothing about the Mounted Combat feat, either in the Monster Vault or in the glossary or in the Rules Compendium.
Which is strange because without Mounted Combat your mount used to have -2 to attack rolls. As per the RC, your mount has the -2 to attacks, period.
At the very least, Mounted Combat should let your mount attack without that penalty.
The glossary entry for mounts doesn't explicitly state that a rider gains access to a mount's traits or powers, though I agree that's how it's intended. (For the record, there seems to be no mention of mount traits anywhere else in the RC.

Incomplete rules FTW! /snark