"You say you want tactical mode, but what does that entail?"
Master of Orion 2 did Tactical combat pretty well for a 1996 game.
I would expect the games that followed to have at least learned from the success of it.
So, turned based.
Control of my ship's movement, not watching a movie of combat.
Weapon Beam upgrades: Continuous, Autofire, Shield Piercing, Enveloping on various types of weapons.
Missile Weapon upgrades: Fast, Armored, ECM, MIRV.
Torpedo Upgrades: Overloaded, Enveloping.
Use of a Tractor Beam to slow a ship down.
Crew Killing Weapons to reduce defending marines.
Use of Boarding Parties for Ship Capturing.
A Cloaking Device to make one's ship invisible/untargetable to give time to reload or move to a better location.
Drop mines out a rear hatch or shuttle bay of your ship to damage other ships or destroy fighters.
These are not new ideas.
All but the last one was in MOO2 20 years ago.
The last one was done back in 1966 in the Original Star Trek TV Series. Star Fleet Battles incorporated it into it's board game in 1979, and SFB 1&2 PC games back in 1999 and 2000.
I don't need a 3-d environment. There are plenty of those games out there lately.
Blowing up ships is in every game. Capturing ships is only in the best games. People hold that in high regard and enjoy having it as an option.