I had this as well, it is likely turrets - biter farm on nauvis? I updated to accept XP from across the world as it seemed too slow for my overall aim. I could have overshot it.
I have moved on quite a few versions with internal testing for 2.0 and added1 skill so far that will take 100 points, they'll be others. This kind of relates to that.
What where the skill points for, what was the point? Is there something really interesting to grind for. Early game was pretty easy with tangible benefits, late game, not so much, I want some high costing skills that can give the player who wants to farm xp a bit of a goal - in this case it's a play on the iron man Armor.
Essentially I realised that it got to a point and it was like yeah, what ever, more research prod or w/e, the trade off for 2.0 will be losing out on more interesting upgrades. I have been checking against mods that increase the difficulty (Rampant being the main one) to keep the challenge relevant. Bear with me, and if it's too much for now consider reducing the XP gain.
You've given some really quality feedback in the past, so I would consider releasing my preclude to 2.0 now (1.99.5 or something) and adding options for surface XP.
My intent for 2.0 however is that each point feels important, in it's current testing state the XP curve or values have not been touched, so it's not quite ready.