devtrackers.gg
A clan member mentioned a loose idea that you'd get some Expertise experience from standard daily and weekly Projects (you might even include the extra season pass Project into this, to give some additional benefit to recipients holding the season pass)? This got me thinking: I'd say this would be an excellent carrot for the doing the two major project types, that act as a general activity guide for the player base.
This additional exp would allow for advancing the Expertise, even for dedicated "hardcore" players that are close to or already maxed out all their Proficiencies (Expertise lvl 23 is the current maximum, iirc?), while giving "less hardcore" players a valuable boost to their Expertise progress.
The amount of experience actually awarded would probably be better left to the designer team, but I'd wager the weekly Project awarding something like 20 exp and the two dailies (for season pass accounts) giving 2 exp each sound like a pretty suitable reward. I'm guessing leveling up Expertise requires 200 exp even on the highest levels and the additional exp from these Projects would thus give disciplined season pass players clearing every daily and weekly Project an extra 48 exp per week, netting these dedicated accounts almost one new Expertise per month.