Look, it's remarkably simple to predict the effect increased capital presence would have in Liberty.
Firstly and most importantly, pirates would compensate. We, the Rogues, would, in all likelihood, exchange our Greyhounds for Falcatas, as the Barghest's not a combat-effective vessel; thereby decreasing piratical roleplay value as Liberty factions metamorphose into merely yet another collection of Outcast clones.
Secondly, as is obvious by point one, any increase in capital ship activity wouldn't last. Obviously, facing a force composed mainly of bombers necessitates a counter, as well; the Navy would abandon larger vessels in favor of something capable of countering bombers. We'd then switch back to Greyhounds or their local equivalents, and the Navy would roll out capships once more..
See where this is going? Essentially, speaking from a PvP point of view, any overt change in ship distribution isn't likely to remain constant for very long times at all.
Thirdly, rather than educating ignorant newcomers on proper roleplay methods, increased capital ship presence in Liberty would likely act as an attractor for those that simply want size and power out of their Freelancer experience. After all, what's more enthralling than allying oneself with a player faction consisting of a flotilla of colossal vessels? Furthermore, such an overbearing military presence might possibly deter new players from creating pirates, rendering a large capital ship presence unnecessary anyway.
Lastly, from a roleplay point of view, large vessels are only actually dispatched to deal with suitably large threats. Active employment of garguantuan warships would render Liberty quite the Orwellian state; think back to Rheinland in the single-player campaign. Did that seem like a welcoming atmosphere or like a benevolent government interested in defending its people? Quite the converse. Warships ought never to be deployed on a regular basis, excepting stationary vessels tasked with protecting a specific region, such as the Missouri or the Rio Grande - employing dreadnoughts to crush Bloodhounds is not merely shooting flies with a rifle, but actually leads to a totalitarian situation the average Libertonian would never tolerate. Even if Liberty should be or should become tainted (as I firmly believe it is), it must maintain the illusion of benign interest. Examine the news items displayed in single-player after the Unity, Harmony, and its third unnamed equivalent are deployed to guard New York jump gates after Ashcroft's apprehension.
In a nutshell, capital ship deployment is a tool that practically begs to be employed as a sledgehammer, but is actually more suited for precise, delicate work - aside from being infeasible as a PvP tactic, roleplay as a whole is enhanced if the machines of war are employed in moderation.
