My argument is perfectly coherent. We don't need to build heavier ships, especially not right now. We can achieve perfectly respectable combat power on ships in the light cruiser tonnage (as demonstrated by the Excalibur), which will make them if not cheap at least not painful to build.
The Excalibur
is a competent combatant at its current weight, true. It is also
merely adequate at science and engineering. If all we wanted was excellent combat ships, we could be happy at this weight.
With the Attenboroughs, we focused on something else - biology. We made a truly excellent bio-sci ship. We even managed to squeeze in a ...
sufficient ... armament. I'm not sure it'll have enough punch as time goes on, but it's good enough for now.
The problem is, we're not building enough ships to get by with specialist single-taskers. Now that we've finished with the war, we know the minimum firepower we must include on every single ship we build going forward.
Roughly, every ship from now on needs to be able to throw down with a D7, for at least long enough to go to warp and escape, but preferentially able to chase the D7 away from whatever colony it's raiding.
And Sayle has made it pretty clear, we're not going to be building enough ships to blanket the Federation. So any ship that responds to a problem is likely to be the only ship in range.
However, there are more problems than just Klingons.
We want our lone responder to be able to confidently respond to plagues, blights, natural disasters, reactor failures, salt vampires, whatever. Which means we want higher science and engineering scores (and maybe cargo space. and an ice cream machine). Which means we need more modules, which means we need more space, which means we need
bigger heavier ships.
And if we want more than a solid generalist? If we want a showpiece Cream-of-the-Federation
Explorer? We need to go even bigger.
..or we could keep building cruiser-weight specialists, I suppose. Just hope that the Attenborough shows up for the cranky Ents and the Excalibur for the planet-eating cosmozoa, and not the other way around.
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Where do heavier ships get more firepower? Did phasers get reworked so we can fire more than two at a time? Are we going to start spending 30-50 cost on RFLs?
Bigger ship, more room to mount torpedos. Also, they get more shields, which means they survive longer, which means they can keep shooting for longer.
And the more they get used, the sooner RFLs become standardized and affordable. I'm personally hoping that 2 RFL forward + 1 RFL back becomes standard.
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sometimes you just need more ships
Except
we can't get more ships. Warp core production places a hard upper limit on the number of ships we can build.
Which is why folks are talking about making better
ships instead. We've come full circle!