I think it is worthwhile to point out that there are 3 caravan routes, so up to 24 people can be out doing escort duty.
Out of how many players on the servers? Tens, Hundreds, Thousands? As said, this is a MMO, and in case anyone forgotten, it stands for Massively Multiplayer Online, NOT 24 players.

Also, you are presently trying to get seals during peek seal-hunting-time
This is not the peak hunting season, this is what SE expect us to do. They want 50K seals just for relic and the latest rank promotion. Even when consider that you have the caravan down perfect, that is 50 1K runs, or 12-1/2 hours per player. This is not counting if anyone needs any other GC items. That is a lot of time required from the player base given the limited slots allocated.

It is also worth to note that there are still alternative (instanced) methods of getting seals should one wish:
-- Darkhold Dungeon
-- Toto-Rak

(and others as you have suggested)
And why are not more people doing those?

rather than just a few days after the appearance of a demand for a lot of seals.
We didn't set the demand for those seals, SE did. SE can ALSO lower the seal requirements, instead of 25K, they can make it 10K. Won't that also help resolve some of these overcrowding conditions?

Don't forget, many of us play this as a game, and not some RMT that plays this game as a job. I have a job already, and I don't need this game to be my 2nd job.

The sad and funny part is, that SE reminds you to not to allow the game to over take your life every time you login, yet, they come out with all these "requirements" that demands you to play the games for hours, and often days, just to get anything useful in game.

jc