If you have PG's, or AM's, DD's with troops capacity they will get the troops, the problem for those that play allies for some reason many US and other ships do not have carrying cap+ability while their Japanese corresponding classes have. USN side for example ships that are often employed fro escort do not have troops capacity : AM, DM/S, Pc etc.
In my mod I gave the USN DMs a small carrying capacity, that can be used in fast transport TFs. By the time you get all the Robert H. Smith class, the historical SOP was for mines to be air or sub delivered, which is pretty much what happens in game as well. So rather than simply using them as AAA escorts, I built another option in for the allied player.
"You may find that having is not so nearly pleasing a thing as wanting. It is not logical, but it is often true."
- Cdr Spock