If it's an optional DLC that can be deactivated, then it might be quite handy for new players.
Indeed. I think some long-time Vic2 players forget that there's a steep learning curve for beginners-- and the more people we can get playing and figuring out the game, the more people will stick around and continue to support it. Everybody wins.
Even better would be if those advisors could be modded-- it'd be lovely if we could advise a player about things that are different in PDM, for example. "You have a Pacifist government-- that means many wargoals will be restricted!"