But a change could give you a choice of an upgrade path. Sure you won't have the same surprise and reaction but I would prefer having influence over what happens to a mod rather than the current setup where hours of gathering can be wasted.
For myself I love planning it builds and I sometimes need specific rolls for that. I'm fairly sure that no one has a courier quite like mine, and even with sliders that would continue. A meta would probably only be followed by those chasing min/max like serious PvP'ers, the rest of us would tweak away for the fun.
The way the stacked rng can effectively waste a player's time is horrible design that we have no influence over. IMO that needs to change.
I'm OK taking the rough with the smooth, which is probably the main reason I like engineers as they are.
Having said that, if they change their approach and add sliders I'd also be OK with that as it seems to bother a lot of players and it's not a big deal for me.
I suspect people will grind and complain just as much however, it's not the game it's how you approach it that makes the difference.