its a move to attract casual players but i think the execution is wrong. IMO they should do it this way

1) when u start the raid, u can talk to one of the dragon aspect (or insert any random NPC here) and ask for their blessings/help
2) by doing the above, u get the said buff. but if u choose to ignore the NPC altogether u get no buff
3) after completing DS, u get the extra achivement if u do it with no buff. that way for those hardcore gamers they still can differentiate themselves from casual gamers meanwhile casual gamers will not be left out of DS loots

just my 2cents