I noticed that the City-Kingdom of Tharabad doesn't have the option to recruit Mariner infantry like RK does. This is a little confusing to me: Tharabad is a trade-based kingdom with powerful naval capabilities, positioned to expand into a much larger sea-based kingdom. With this in mind, it is a little confusing that the only "Mariner" type infantry they are able to recruit are archers. Why can't they recruit Mariner-style swordsmen rivaling or even surpassing those of RK? Shouldn't they be able to? They already have the Merchant Guard, which bear a heavy resemblance to the RK Mariners, so a "lesser," recruit-able form of these guys for Tharabad makes sense (at least in my mind). They could be called "Merchant Infantry" or something.
Such a unit wouldn't be all that hard to make; it could even just be a reskin of the current RK Mariner with a Tharabad shield and colors. I also get that the current RK Mariner is supposed to be a "distinctive" RK unit, so I guess the other option would be to make a lightly armed sword unit that could swim but doesn't necessarily look exactly like the RK Mariner (maybe like the RK Mariner but minus the helmet or something). Is there any existing plan to do this? Or is what I'm proposing completely new? Right now, it just feels a little odd having to load "Tower Swordsmen" into my ships (who can't swim) to act as my sea-borne infantry when RK has Mariners (who can swim) to do the same job. I want some Mariner infantry to complement my Mariner archers!