I’m sorry I have to criticize your UU again but all in good intentions -
UU = 5 + 30% = 6.5 str vs. city + being aggressive makes it even more stronger.
Swordsmen = 6 + 10% = 6.6 str vs. city.
Which again renders Swordsman as useless, not to mention your UU has 50% melee attack. Its simply too strong that early in the game.
I think the the right way would be to add some auxiliary skill, like having a regular axmen with blitz, or 75% melee units (instead of 50), or making it start with woodsman promotion or maybe only adding 10% city attack.