Plain and simple. I've wanted a mod like this for a while, but boni made a twitter post saying they weren't going to update Tinkers' Tool Leveling and Iguanas Tinker Tweaks hasn't been updated in years.
If anyone who sees this has the know-how to update Iguanas or Tinkers Tool Leveling, it would be greatly appreciated.
Even just a similar mod with the same leveling system (getting modifiers every level, random modifier every other level, etc.) would be awesome