Thanks mate !
Well the downside are getting stronger for this 2.0 : Can't be upgraded from & into any units (your samurai will remain samurai till end of game) so it's a loss of prod unless you train them hard.
50 raw str is a bit above average (48 str was samurai vanilla, 45 some equally around unique units of other countries, like mamluk) but considering their strong required prod and maintenance cost, it's clearly not. When it starts, it's like you produced 2 units of vanilla 40~ strengh for just +10. Building 2 units with 40str would have been better at this time, but again if you train them well, prevent them to die, they will grow and finally reach the strengh of a unit that can handle 2 x 50 str alone (50 + 10 + 15 = 75 str, and 75 str is defeatable with 2 x 50's). A full promoted samurai like this will require lot of time invested & the numerous sweaty fights so ... it's a bit like a hero. Later on, you will want to even make a corps or army with them to sustain again modern units.
With the many test i ran, it wasn't OP. Especially starting from king difficulty and greater. (i admit that in difficulty below prince, this mod is not recommended, since you even get more fight free bonuses). It's perfect for emperor difficulty (really hard and funny to keep them alive).
I had awesome fun to make this mod, i think i could do that with more unique units ... but in the other hand i will quickly run out of diffferent ideas for unique promotions or they will be too hard for me to code properly.
Also these unique promotion trees mean the units can't be upgraded into/from units without creating some promotion glitchs/bugs. I don't know if players are ready to see all of their unique units with no upgrade possibility because of their unique and fun promotion tree.
