. But one player has double the primary stats of the other because he's rerolled his gear repeatedly for better traits and stats.
That's not how it works. You hit a hard cap on how many times you can reroll due to the 1000 PC cap, and your last roll can be the worst of all or possibly not even be the same attribute anymore. Imagine spending 954 phoenix credits trying to reroll your crit from 31% to 35% and the only option that comes up on the table is +XP or Scavanging (which I don't believe are on the same table as Crit but you see what I mean).
And that's assuming you got a good enough roll on the base item that only had ONE thing wrong with it, and if that wrong thing was + ammo capacity and you wanted + crit then you waste your roll changing the attribute and don't even get to min/max the range of an existing slot.
This game is seriously worse odds than legit gambling.
So given the above, no, this was not a legit cause for crafting nerfs. People crafting 50-100 of the same item are doing so because they never got perfect attribute rolls in the first place worth re calibrating, and statistically never will. What are they nerfing by stopping people from getting what they never got in the first place? Craft 50 items, get a decent roll, try to recalibate, after 3-4 tries it becomes not worth it, so go back and craft 50 more and pray.
Nobody has best in slot all slots and nobody ever will. I doubt anyone has a single item with all 100% perfect rolls. The multiplicative odds of getting the item, having it be HE, having the right talent, and all the right attributes, AND having them ALL be 100% of their max values, is like 1 in the_age_of_the_universe. You would seriously win the lottery several times first.
So they are... trying to slow down what was already basically impossible... makes no sense at all.
The most that even the top 1% geared players can hope for is having i31 with the right talent, with no more than 1 major attribute wrong (or 0 so you can min/max an existing one instead of using your re calibrate to change the attribute), and even then you often have to settle for 80-90% range and not caring what the minor skill attribute is (the +% healing/pulse/cover/shield/sticky radius, etc). Just getting this far and not having at least one stat like the primary state or armor value be a low to mid roll is a miracle.
This is pretty much where I am now. I can craft all day and not get one thing better than what I already have.