You can find details of that penalty system here, but essentially, expect to be fined currency or experience of an equal value to the match you abandoned/didn't do anything in (with a few exceptions, explained in the linked post). Also in the update: more higher-def vehicle models, balancing, and improvements to the newly implemented Strongholds mode. You can now employ Legionnaires (these are players unaffiliated with a clan), and construct a War Department, i.e. "a building which will give random quests" to your fellow clan members.
Here's all that again, in video form:
Ta, PCGamesN.
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Tom loves exploring in games, whether it’s going the wrong way in a platformer or burgling an apartment in Deus Ex. His favourite game worlds—Stalker, Dark Souls, Thief—have an atmosphere you could wallop with a blackjack. He enjoys horror, adventure, puzzle games and RPGs, and played the Japanese version of Final Fantasy VIII with a translated script he printed off from the internet. Tom has been writing about free games for PC Gamer since 2012. If he were packing for a desert island, he’d take his giant Columbo boxset and a laptop stuffed with PuzzleScript games.