Please register for Total War Access to use the forums. If you're an existing user, your forum details will be merged with Total War Access if you register with the same email or username. For more information please read our FAQ’s here.
I found few of these abusers using some sort of glitch or a bug when they host Multiplayer Lobbies which enables them with 40 army sizes while others get the regular 20. The Large Armies are also not ticked on, and this was in a 3vs3 which is impossible to wield Large Armies in battle by normal or regular way..
Picture is proof this person using the abuse notice no one else got large armies.