We might soon be having designs capable of a sprint of warp 8.5 once those nacelles are out
Uhm.
Excalibur-class Heavy Cruiser [2225]
[...]
Warp (Maximum Warp): 8.6 (636c)
We're already there and then some.
On the contrary, suppressing piracy isn't a one-and-done thing. It's a continuous job, like having a military to defend yourself with. Just because you win one war doesn't mean you're completely safe forever.
You're misunderstanding.
The point being made
is not, "Once you wipe out all the pirates, piracy suppression is useless."
The point being made is, "Once you have enough ships on antipiracy patrol on a permanent, ongoing basis to wipe out piracy within your area of influence, building and assigning
additional ships to do more antipiracy patrols is useless."
Once you have 0 piracy, you obviously can't
stop doing antipiracy work, but you also have zero marginal value from doing
more antipiracy work.
On your first point where are you getting 2 years to un mothball a ship,
The
Iowa-class battleships, as the only example of pinnacle warships being taken out of full mothballs that I could think of offhand. They took about two years for an
extremely half-assed and unsatisfactory job.
A cargo ship company's blog post claims they took "3-4 weeks to restart a vessel that is in cold laid-up." This is a long ways below fully mothballed- while nobody's living aboard full-time, it involves having maintenance personnel on board regularly (as in, multiple days a week) doing inspection, maintenance, regular power-up, testing, and power-down all of its rotating equipment to ensure continued functioning, monitoring its moorings, etc. It is
not fully drained of fluids.
As for the crew I was personally thinking we could train the colonies to man them.
HOLY FLYING SPAGHETTI MONSTER, NO. ABSOLUTELY THE FUCK NOT IN ANY CIRCUMSTANCES WHATSOEVER.
It is an explicit part of Starfleet's purpose and function- a very minor part, but indubitably
part of our actual job- to be "the guys who we trust to have antimatter", so that the Federation can keep antimatter, antimatter-powered ships, and antimatter weaponry
out of the hands of anyone except Starfleet itself and its member worlds' own navies. Colonies do not get to have antimatter-powered starships to crew with their local National Guard.
Core worlds do not get to have antimatter-powered starships to crew with their local National Guard. If you want access to antimatter,
join Starfleet. (Or a major research university, if you only need a few thousand antiprotons every once in a while.)
Putting a
Defiant in more-or-less-ready reserve on every colony and stationing the relative handful of Starfleet personnel that it would require there is one thing. It's not a proposal I'd vote for myself, but it's wildly farfetched or anything, just uneconomical.
Putting a
Defiant in more-or-less-ready reserve on every colony for them to crew locally? In-setting, even
seriously proposing it would be a career-ending level of idiotic mistake. Out-of-setting, I would argue against it vociferously and at tedious length. Even if you trust their maintenance and access-control to be literally perfect forever (and I very much do not) it puts too much destructive power too close to too many minor unsupervised political shenanigans.
As for your 3 point which is cheaper having to constantly rebuild all our infernstuture or having a few cheap guard ships [...] In simple terms what is the value you hold for the ability to not have to worry about making our ships half warship all the time. That is the value of a warship.
It's
massively cheaper to make all our ships half warship than it is to make
so many full warships that we don't need to.
