I'm not a completionist. I don't finish every quest line in the game. Once an area was green to me, I finished up the class quest and moved on.
I'm now 50 and I have 22 quests in my quest log that are grey and I can not abandon them.
This means I can't work on all 4 pvp dailies/weeklies at once. I can't work on all the Daily Commendation quests in a zone at once.
Effectivly, the only way to gear up at 50 is grindy crap like this, and I cant do them.
Ok, so I go back and try the Revanite quest line just to get rid of it. I'm 40 levels over the quest, I'm over an hour into it and still just running around...
THIS HAS GOT TO CHANGE.
If you can't do it quickly, up the quest limit temporarily. Seriously, what is the gameplay effect you are trying to create by limiting to 25 anyway?