I like to play just as most run and gun players do, and the energy system does EVERYTHING to prevent that. I love playing Instant Action, and what I usually do is cloak and scout for enemies. By the time I confront an enemy, my energy has almost been completely depleted. I use the Energy Transfer module in my main loadout along with Mobility Enhance, and the problem with this is that I have to stand where I killed my most recent enemy, and wait a few seconds for the module to give me my energy boost. What's wrong with this? If I happen to use any of my suit abilities (armor, cloak, or sprinting), the energy transfer is canceled, and I'm left with nothing, prone to enemy attack.
Why I'm not so happy with this, is because in this game, enemies are almost always close by, standing there waiting for my energy boost with no protection at all is equal to just begging to murdered. Other players in Instant Action are constantly on the move, looking for victims of their own, and what happens when they just see someone standing there?
The worse part about this is that sprinting is linked with your energy bar, so I couldn't run from any pursuers if I wanted to. Sure, I do use Mobility Enhance, but using it after a kill won't really be so effective, and I'll never know how much energy my opponents have got.