I don't think role actions are a nerf. Imo, I think it streamlines the combat/addtional actions system in such a way that it'll be less confusing for people as to what to do/level, while still keeping the original image of the jobs it applies to intact.

One of the things I hated the most about the cross-class system is being forced to level a different job, one you might not like, just for that one optimal skill for your main. e.g it took me until very recently to unlock Mantra, which incidentally was the last cross-class I needed to unlock, because I couldn't be bothered leveling Monk until, again, very recently (to get an armour set for SAM ready). The system has become needlessly convoluted.

It kinda makes me sad to see all that I worked for go away (the point of leveling all jobs), but I also welcome the cross-role system as well as the general streamlining of combat because I think that's what this game really needs.