The known issues say a nerf is coming eventually:
That change would pointlessly reduce the power of class combinations that are already suboptimal. It doesn't hurt anything to give builds like Fighter18/Rogue2 a few more uses of Skill and Damage Boost (especially since the boosts from other classes will be at low tier anyhow). In addition, the descriptive text is shorter when no discrimination is made as to which boosts are affected.The enhancement 'Extra Action Boosts' should only be boosting the number of Fighter action boosts. Currently it is boosting the number of all action boosts. This will be corrected in the near future.
As a rule of thumb, it is a bad idea to nerf synergy between features of different classes unless there is an established judgement that the combination is overpowered. It is also inadvisable to nerf a character feature without giving players a respec token as compensation.