I was just recently turning into Vanguard, and I've realized that I'm using the party finder. Now, the problem is, that there are a bunch of missions everywhere for it. My suggestion is to organize it by dividing the types of missions like this:

All
Prestige
Expansions
Gates
Missions
Bosses

These would be like tabs. For example, there are 6 tabs (And there is), and you can click one of them. All gives all of the missions of course, prestige gives danger missions first, then the daily regular prestige, expansion missions would always be Operation Crimson Hammer, but would be sorted from Tier 3 on top to Tier 1 on the bottom. Next, gates would be sorted based on how the gates are placed in the missions place. The missions would be sorted by the highest mission to the lowest mission. Last but not least, bosses. They would be sorted by rank. Snarby would be last, Jelly king will be second last, the twins will be third last and FSC would be on top.

Yes, I know you could use the "Join a party feature", but maybe we can also add other ways in finding different missions. For example, let's say you click join party for FSC. You ended up going with normal knights. But when you search for another party doing FSC and find a strong lockdown player who is good in doing missions too, you would be able to join him. Or anybody who's strong.

I know that I'm going to face some rage comments and negativity in here, but it's worth a try.