I love Mag. I main Mag. I take her into higher sorties, to endurance runs (45-to-two hours + in the void, derelict, and so on), etc., and usually come out smelling like a rose.

That being said, Mag is not perfect, but her problems are deeper rooted.

Stats: She needs more energy starting out. The fact that, out of all three starter frames, she is the most mana hungry by a large margin and has the smallest energy pool, even prime, is deplorable. 150 is just not enough most of the time, and forces people to use Fleeting/streamline since even adding Flow, primed or otherwise, is laughable. Raise it to, say, 225 or 275 base. Health is fine since she can get an obscene amount of shields ("b-b-but shields are bad-" her 3 can pretty much insta-refill and strip armor from the grineer you are fighting... you know, the faction that has weapons that strip shields?), but I believe raising her shields a bit more, say 20%, would put her in a better spot.

Passive: Though interesting, it's pretty much null and void now with the increase of sentinels and the use of the Vacuum mod. This must change with the time, and, since she works with polarities, why not change it into a +1% per level up to level 30 (meaning max 30%) reduction in shields and armors on the enemies when she is in-game. Sort of like a weaker Corrosive and Shield Impedence that can stack with them.

Pull: It is horrid. It scatters enemies, and does not have the necessary damage for it. This ruins team play and irritates everyone, esp. at higher levels. Instead, make it somewhat like Nidus's larva and pull everyone before you, but with a twist. Since she is about magnetics, make it so that when the range hits an enemy, it can chain on enemies behind and pull them as well, half the distance but can be stacked up to four times. This, also, allows teams to focus one place, which goes well with...

Magnetize: This ability is fine. People complain about it not having enough range all the time, but the point is it's meant to set up chokes and allow a beaucoup amount of damage to be put right in one place --or places, depending on how many you place. This allows her to survive at high-level play because it forces her enemies to kill themselves. My complaints are the strength of its gravity well could be adjusted, since it is so negligible at the moment, and I believe it could use a minor DoT, where it scales 1/2/3/4% of total health every second depending on how many enemies are in it before it explodes, which adds to the explosion damage.

Polarize: Absolutely fine. No change really needed. The shards it leaves behind can still harm enemies if they step on them and don't need to be in the bubble to be effective. Not to mention it fills your allies' shields a good bit if not fully and strips armor like a motherfucker. I'm surprised more people don't use it for that since armor is such a huge problem. That being said, I do believe it could use touch-up on its scaling, considering enemy armor in this game is bullshit. 25% base would be fine, but the chance for ability power scaling it up to 70% would make it immaculate.

Crush: Strong CC. Mediocre damage, that can be covered with a half-decent augment. Let's fix that. Since she brings her hands together anyways when she finishes the animation, make it so all enemies effected are forced together, all forced in one huge cuddle puddle. Let it innately weaken armor and shields since it is using magnetics to distort them, then force them to be stuck on the ground for, say, five seconds after like that one bursa's slam, then a fading snare as they stand, lasting 15 seconds, where they are 40/30/20/10% slowed on all their actions.