There are some players (not all) who find the Time Units to be a little cumbersome (and of course, we do have to try and appeal to a wide audience). Our system hopes to reduce the reliance on counting tiles and mathing out Time Units for actions. We're relying on a more modern, simplistic interface (closer to that of nuXCom) to give players their options at a glance, and keep up the pace of gameplay.
I appreciate the fact that you have come to this den of thugs to breach the gospel of Gollop. RPG Codex is not an easy place to market modern reboots of classic games. You will probably find that the majority of people here will not agree with your decision to dumb down the original's brilliant time unit system.
Wouldn't it be possible to implement both the time unit system and a more streamlined dummy version? First you design the game based on time units and them you add a mode in which units can accomplish approximately the same amount of stuff in a combat round without calculating time units. This sounds like an obvious choice since it pleases both the fans of the original XCOM and the nuXCOM fanbase. It would require some extra work, but it would also greatly extend the lifespan of the game.
As it is today, I don't think you differentiate your game enough from the nuXCOM games and will have a hard time trying to improve it's formula. Your game will end up looking like a cheap imitation of the nuXCOM instead of being the rebirth of an old classic.