Maybe not. The newest members of the Navy might be stationed on the escorts. Likewise, the Navy could station the school grads/brightest members on the capital ships to make them more efficient and leave the drop-outs to the escorts.
From a historical point of view this is wrong: in almost any navy the crews of escorts are/were more expericend than those of dedicated warships. The reason is quite simple: while the large ships of the line only saw action during real wars (they are simply to expensive to operate them all the time) the fregattes/corvettes/destroyers had action all the time: patroling, privateering, catching pirates etc.
Crews of small ships usually harmonize/get used to one another better than those of capital ships. (Oh, and you can't simply transfer acrew from one ship to another, especially if there arre such large differences in (crew)size)
-> I really think that escort squadrons should throw 2D6 and pick the highest when the LD values are determined.
According to me they're worth more to the fleet more likely to need them, ie, low leadership fleets.
While I generally agree that some Fleet Commanders/rerolls are overpriced (e.g. pirate prince) you could argue that you pay more, because the total chance of passing the test is higher:
LD 10 with reroll: 99,3% chance
LD 9 with reroll: 97,2% chance
LD 8 with reroll: 92,3% chance
LD 7 with reroll: 82,6% chance
This isn't that much (and IMO does not justify the large difference in pointcosts), but you could argue that a Ld10 reroll is a sure thing, while one with LD 7 is just a 4:5 chnace...
The other, more important argument is already mentioned: Orcs have cheap rerolls, because they need it.
Sure, they have cheaper ships, but this is simply related to the inferior profile, the lower LD value isn't really reflected by this fact. You can see that by a simple example: the average imperial LD is 7,5, Eldar 8,5 and Orcs 6,5.
We asume that we have a (hypothical) pure carrier for, say, 200 Points and that carriers „live" from passed RO-checks.
An (average) LD of 6,5 means a ship passes 50% of it's Ld checks.
An average LD of 7,5 means a ship passes 65,3% of it's Ld checks
an average LD of 8,5 means a ship passes 77,8% of it's Ld checks
Simply spoken: if our ship costs 200 point in an ork fleet it should cost ~260 points in an imperial fleet and ~ 310 Points in an Eldar fleet, just because of the different LD. (with otherwise identical rules!)
Other way around this means if our ship costs 200 Points in an imperial/chaos fleet it should only cost 155 points in an orc fleet.
Of course this is a very academic example, as special orders aren't THAT important, but I think one can get the point with this example.
Can you imagine how people would react if orcs had the same ships as Chaos/Imperials but for ¾ of the price?
So the current solution isn't that bad: Orc ships are overpriced for the LD value, but for this they get discount on rerolls/ fleet commanders etc.
Not perfect, but practical, because if you would price orc ships according to their LD value they had to be insanly cheap.