Sin117

Well if you are talking about tools they have in Eve, like Titans and Super Carriers, they can add them in and it won't break the game possibly ever. How so? Or am I daft? Well my assumption is the requirement of actual bodies for ship modules, since you need actual ships to man the turrets and crew to do repairs or put out fire etc. The balancing factor is efficiency. Using this as a reference, if you are running a large organization, of lets say 10k players, is it smarter to use your limited resources for 1 titan measuring +13k meters or say 1 super carrier for +5k meters/30 battleships at 1600 meters/few squad of bombers? Or just 60 1600m  battleships? If a battle occurs, is it wise to send your only combat asset of a titan measuring +13k meters and hope the turrets kill all 60 battleships moving at the same time before they are destroyed?  Or a super carrier with a few squadrons of bombers + 30 battleships?  
 
Another factor that you have to consider is the actual resources required and to build it in secret without info being leaked out. In this example here and here, these are instances of where info of one in the oven led to a formation of multiple people to siege a system and  latter the result of sinking your alliance resources into one ship and losing it. Keep in mind that a titan can be completed by a few individuals in Eve compared to Dual Universe, where you have get multiple people to participate. The most powerful ship in our world is a carrier and it has something called a "carrier strike group" and it is undisputed that it only take a lone submarine to sink a $13 billion investment. 
 
The last major point, even if they put in a ship as big as a titan (13k meters) in alpha 3, it is unlikely we will see even capital fight with ships the size of 5k meters for a hot minute. From my view it has to do with automation of industry. In Eve online it is easy to mass produce ships as as your only bottleneck was the human assets (F1 monkey) & ore with some logistical issues. DU on the other hand, not only do you have to hand create the ship (blueprint), mine the ore by hand, build infrastructure that can support the ship, build said ship by hand, have the necessary fuel/ammo + logistical backbone to support said ship, and also have enough resources to actually support & defend the ship (destroyers, cruisers, frigs, and etc). We haven't even gotten into the insane world of espionage that can have major detrimental impact in construction in DU. 
 
I would be surprised if there was a capital ship in pvp within the first year or two, barring any changes in later expansions that help alleviate the critical issues in automation & construction. Military strategy has make the option viable compared to the alternatives and I don't see it in the release state of the game. I also caution people against making one for the foreseeable future unless an expansion makes them viable. Bigger doesn't necessarily translate to something that is better.