Bonus stat progression and xp costs

Thanks to a reddit thread, I think I know how the xp curve progresses now.

It's probably 1x -> 3x -> 6x -> 10x -> 15x -> 21x, or 2,127,000 -> 6,381,000 -> 12,762,000 -> 21,270,000 -> 31,905,000 -> 44,667,000xp required for level 6. Which is frankly a completely insane grind since I've been playing the multiplayer for ~100 hours and I have ~17 million bonus xp total. You're looking at grinding a specific bonus stat for ~250-300 hours to get it to level 6 for a measly 6% bonus.

Could we please see a boost to say 4% per level instead of 1%? Might feel worth it then.