So, let me ask this.
Given all that's said here, how does Brilliant Lances fall short?
Let's disregard the design system for the moment, how does BL not live up to these requirements?
It has all of these things. Big guns, little guns, armor, "agility", "power points", missiles, point defense, ECM, ECCM, sensors, big hits crit small ship. Really big hits crit really big ships.
It has damage boxes, it can accommodate multiple systems, redundant systems, multiple spinals, etc.
If you want to just line fleets up ala HG and Let Fly, I'm sure it can manage that as well. Simplify the movement system, sure. Maybe Master Fire Directors are a bit fiddly, fine -- yank 'em out. Or line them up ala Battle Rider and crit each other to death.
Not suggesting its perfect, but seems to be the closest thing to a foundation that we have that can be tweaked vs just starting from scratch.
Because, lets be clear, this is not a "take LBB combat and 'fix' it", this is a goal driven design of a new combat system. The bathwater is gone, and the baby is clinging to the edge of the tub.