Level Up & OSR Enthusiast
The battlemaster was vastly improved upon by the base fighter in Level Up, and I stand by the Echo Knight being, while a very cool idea, overpowered, but I get your point.On the contrary. I think that subsystems have been used since 4e far better than they were quarter of a century ago. Races, classes, and monsters all work by exception based design so they get to have their own subsystems that best exemplify them and how they are distinctive built on top of a common core that's designed with bolt-ons in mind.
This isn't the 1e "throw everything against the wall and see what sticks including helmet rules, weapon speed factors, etc." approach. And it's not the 2e "Let's overwrite parts of the existing system and take away abilities to give new ones with things such as kits and 'Non-Weapon Proficiencies'". But there are definite subsystems - and I'll take the Battlemaster and the Echo Knight over any two 2e kits any day.