To be honest, depends on what I would be allowed to change really and what the reach on it would be.
On a basic level with no massive ramifications system wide, my main issue is secondaries. Some armies just wimper at needing to have them while others are so spoiled for choice they struggle to pick anything other than engage on all fronts, octarius data and whichever target is most available.
Mainly I would change most of the action objectives to being "at the start of your next command phase or end of game, whichever occurs first, this action is completed" as right now Octarius is basically a meme with most lists literally taxed into taking a deep striking unit to do the objective that is as cheap as possible or a unit that can just zip up the board in an annoying position and get it done turn 2. Very little risk to it for major gain not to mention planning out how you will do it isn't very difficult. Got a dead turn? Well just do one in one of your own quarters, set-up for the next turn.
Engage on all fronts is also a double dip into octarius data. I personally would think also that Engage should actually be 3 thirds and having units in all thirds attacking units within their own thirds (if none are applicable then targeting a unit in a neighbouring third counts but each enemy unit can only count for one third). After all, Battlefield supremacy should be about that, not just being able to say "by having a unit of rookies here that are extremely easily killed, one plane flying through this air space for no reason, that shows we are in control".
Again however, main issue is how easy actions are to complete with little to no interaction. Like the only option is being able to zone out the enemy completely from moving and that isn't really fun gameplay. "Yes...now we stare at each other like pawns in a game of chess...unable to advance but equally unable to attack". Make it should doing actions needs some element of covering the unit rather than..."Welp, they got the objective...no point shooting them now" because most Octarius token units aren't threats. Minor issues that can be cleaned later.