Yes it is strange and a bad gimmick of a “mechanic”.
It detracts from the few unique units that civilizations already have. It is also a lazy way to make “new” content, by literally reusing old mechanics and features in “new” civilizations. Mongol’s reworked landmark is a travesty and this entire mercenary mechanic is starting to appear too many times in the game.
It would have been better if this landmark was more like the Wynguard Palace, that unlocks entirely new units that suppousedly belong to other civilizations, rather than reusing the units already in the game. This would actually make that content new.
For instance, if I wanted to play with Nest of Bees, I’d play Chinese. Funnily enough, I am actually for regional units, but I don’t think a Nest of Bees should be regional, as it is quite unique and special. It’d make more sense for units like Horse Archers, Camels or Elephants. This also stacks the Byzantines in a way that is just kind of sad when comparing with existing civilizations, they have access to many new unique units as well as many unique units from other civilizations, whereas HRE only has a Prelate (barely even a unit at all) and a Landsknecht–and that is without mentioning the Order of the Dragon which will surely pretty much replace HRE altogether.
Sorry, but so much for the entire “AoE4 civilizations are super unique” crap they’ve tried to push. So far most civilizations play the exact same with eco bonuses making the only real difference, and mechanically, almost every “unique” unit is bog standard and boring. The Chinese are probably the civilization with the most interesting units, and all they basically do is splash damage. No wonder their units are being given out to an entire 2 other civilizations.
And as stated above, ironically, I think regional units are a great way to add more depth to separate civilizations. Like Culverins or Ribauldequins or most regional units in AoE2, the different technologies available to different civilizations create unique combinations. Of course, this comes at the cost of making those units standard, and I think that is somewhat necessary, as I think the roster of standard units is too low.
Imagine for example a Fire Lancer in a Mongol’s army could do vastly more Fire damage because of Kurultai and Additional Torches. Or if civilizations that used Horse Archers, actually had them, like Ottoman where you could combine them with Mehters for devastating effect. Camel Archers made by Malians would have Poisoned Arrows and Precision Training and so on.
Regional units like this adds the depth to the game that AoE4 has been lacking. It would make people actually consider doing something else than Spearman, Horseman and Archer. But, simply giving these units to one civilization or a super niche landmark is NOT the way to do it. Civilizations are meant to have new and unique features, and Landmarks are meant to be different–this reoccouring design is concerning as it waters down the uniqueness of units meant to be UNIQUE.
Unfortunately, someone at Relic’s offices LOVES this gimmick so hey, maybe in 3 years every unit will be available to everyone? Wouldn’t that be amazing???