I am anxious about the increased crew cost on top of my current expenses. I just captured my first Connie; not having the means to buy one and several months behind the crafting curve.
Were I to be penalized for running the 1 durability Constitution I'd just sell it. The risk of losing more than half of my crew allotment (Demon) would be high for the tight budget of time/imaginary currency that I'm running on. No player is going to constrict themselves to losing the vast majority of their crew by running a 1 durability ship unless the risks are adequate (1st Rate).
While the developers are appreciably desirous of trying to hinder zergs, crew recruitment is ultimately going to be pointless as a means of controlling large nations. As previously noted if the costs are too high, anyone in their right mind will sell non-1st-Rate 1 durability ships rather than risk losing both important modules (the current dissuasion) and the majority of their crew allotment. The primary draw upon the nation's pool is predominately the SoL.
The smaller nation must be able to sink the larger ships faster than they can be crewed or else the national crew pool system is pointless. Can the small nation craft enough big ships to eventually face the enemy? Eventually. Particularly after a wipe? The small nation will be gated not by crew nor material resources, but will lose the war through a race of crafting LH.