I put together a spreadsheet that lists all the contents currently in the ship blueprint packages. I didn't see anything when google searching for this or checking the wiki, so I did it myself.
https://docs.google.com/spreadsheets/d/1HITMG6I7HSsAba1lKmEAzoIvYRIIgFiLZ7E58MKGE2I/edit#gid=0Now to review each of these packages, starting with the main three.
MidlineStarting with the midline package because it's easily the best one you can find. It gives the most ships and the most weapons, including a good spread of different options. Including four support warships, two general frontliners, and two carriers. It also includes a cruiser sized transport ship, but this ship is generally not important. Weapon wise it gives a nice set of options in both ballistics and energy weapons, lacking only a large energy weapon option for the sunder. The only weakness is on fighters, as it gives two fighters (light and heavy) without a bomber option. Notably this includes the Drover, by many accounts the best carrier in the game and one that's otherwise quite hard to find in markets.
Low techThe next best package is the low tech one. It gives three good frontline warships, a decent carrier, and a freighter that's almost a direct improvement over the buffalo. It also gives a good set of ballistic weapons accross all weapon sizes and a great fighter and bomber pair.
High techHigh tech is easily the weakest of the main three blueprint packages. Not only does it offer the smallest number of ships, these ships have the least variety as they're all light warships. The wolf is easily the best ship in the package, an otherwise very common ship in markets around the sector. It does offer the best energy weapon options, including large energy weapons that the other two packages lack. On the upside it includes two very good fighters, unfortunately it does not include any carriers to use those fighters.
Luddic ChurchIt always feels bad when you get this package. It only includes three ships, two of which are recolours of default ships. The only potential upside is that it can be an alternative way to unlock the lasher, if you haven't already found the low tech package. No weapons or fighters are in this package.
Luddic PathA large set of alternative versions of mostly common ships that have ill-advised modifications built in. The one unique ship is the Colossus Mk2, a warship that most probably wouldn't want to use. The alternative gremlin does also have safety overrides built in, for what it's worth. No weapons or fighters are in this package.
PiratesA grab bag of different ships, including several recolours of common ships. Two of those recolours, the mule and buffalo, are direct upgrades over the default ones with shielded cargo holds built in. It does notably include an alternative way to get the enforcer and the shriek. For the desperate, it also includes inferior versions of two frigate phase ships and the wolf. Lastly it includes the Mudskipper Mk2, largely a joke ship, and the colossus Mk3 which is a jack of all trades, inferior at all trades. No weapons or fighters are in this package.
Hegemony AuxiliaryThe last blueprint package. It includes a number of militarized versions of common civilian ships and a recoloured wolf. Most likely the wolf is the main ship one will use from this package if they get it, and have not already gotten the high tech package. No weapons or fighters are in this package.
Closing notesThere's one other major package that was not included here, which is the missile package. Unlike the other ones, this one only includes weapons. It is an extremely important package to find, as none of the other packages include any missiles and the only ones that the player has at the start of the game are low quality small missiles. The player can find what they need for their personal fleet from loot and NPC markets, but their faction fleets will have terrible missile weapons.
If I were to make small suggestions for changes:
-A large energy weapon added to the midline package so the sunder can be properly armed, or the removal of the sunder from that package.
-More ships added to the high tech package to round it out as a full kit. Preferably a phase ship (the shade?) and a carrier (new ship?).
-A few missile options added to each of the main three packages, to fill out medium and large weapon mounds and reduce the dependence on finding the missile package. Say the reaper or hammer or annihilator variants for low tech, harpoons or salamanders for midline, and atropos or sabots for high tech.
EDIT: Caught modded Hegemony ships, thanks.