I've noticed that the POWER module is generally the hardest module to level up, and I know why now. I've spent games sprinting, jumping, and melee killing and every other way to use the POWER module but I still come out around 5-700 POWER xp.

Here's the problem: when sprinting, pay attention and you'll notice that in the middle of a sprint, the POWER module light will turn off. You'll still be sprinting but it won't be using the module, thus you are not getting XP for it. I noticed that the light turns off when you hit irregular geometry while sprinting, such as corners, rocks, ramps, etc.

After noticing this, every time I saw the light turn off I'd stop sprinting and then start again, making sure the light was on. After figuring this out I am making 1500+ POWER xp nearly every match.

I guess this is a new bug but it might help those of you who are wondering why the POWER module takes forever to level up.

tl;dr: when you POWER module light is not on, stop sprinting and sprint again. Make sure it stays lit while sprinting or you won't get power XP.

I spend a lot of time melee-ing, my power is levelling just as fast as all my others.

That is not a reasonable fix for it though. I hope they patch it.

Although, I must say, I've never noticed this before and the Power module was the first module I leveled out to the maximum.

Oh yeah, I noticed it but thought nothing of it.

Good find!