in Dark Omen, tactics are less important than they would be in a turn based game.
Let's say I'm a tactical genius, but I'm slow as balls with the mouse. My actions per minute is like 1.
I will lose in Dark Omen, no matter how good my tactics are.
In Dark Omen, tactics are important, but so is actions per minute. It's actually very important, I personally do not have enough actions per minute with the mouse to do well in Dark Omen at all, despite being able to do well in FPS and MMORPG action combat (those tend to use hotkeys more). In order to do well in Dark Omen I would have to practice to improve not my tactics, but my actions per minute with the mouse (speed and accuracy of clicking).
In JA2, your actions per minute don't matter. Only your tactics, strategy and knowledge of the game (and luck).
But in a proper real time with pause game, this is also mostly true. As it will either have auto pause, or you'll just have to hit space bar to pause it. Hitting space bar is very easy even if you have low actions per minute, since your finger can stay on it.
There is no conceptual reason that you could not make a real time with pause game that is as tactical as JA2. No one has done so yet, but hardly anyone is working on this project except some Russians. Real time with pause tactics genre is very niche, so it's not surprising it's a little behind the best turn based tactics right now.
Some Russians did make Brigade E5: New Jagged Union and 7.62mm, real time with pause games that while NOT having as much tactical depth as the very best tactical turn based games, CAN match average and even above average tactical turn based games in terms of tactical depth.
Odds are very high that there will be more tactical depth in 7.62mm than Age of Decadence for example, because one is a tactical game and one is a turn based CRPG with combat apparently inspired by falliout.