This mod greatly increase required XP to level-up on lower levels, slowing down progression. This is mostly done to reduce XP inflation and bring starting progression closer to older payday 2 (even with such drastic changes it's still faster than old payday 2). High levels are barely changed because they already have fine progression speed.

This mod is balanced for first 0lvl → 100lvl playthrough and NOT recommended for infamy grind.
Perk points and carrier mode quest level requirements are adjusted accordingly.

Lvl1: 900xp → 10000xp (+1011%)
Lvl10: 4600xp → 37000xp (+704%)
Lvl25: 9208xp → 127000xp (+1279%)
Lvl50: 91998xp → 402000xp (+337%)
Lvl75: 379582xp → 833250xp (+119%)
Lvl100: 1000000xp → 1420750xp (+42%)
Total XP to reach Lvl100: 23336413xp → 51325000xp (+120%)