Imo this buff should have always been available for people who completed the legendary quest on their main toon. I dont really see why we should have to grind it out twice. The buff doesnt seem to increase the droprate very much at all from my experience.
FYI, last night I noticed that I didn't have to actually go through the process of collecting 5,000 Timeless Coins with this buff. I had around 30,000 Timeless Coins when I got to this part of the quest, and I could just turn 5,000 of what I had in immediately and move on with the rest of the questline. You might make that change in the "Unaffected Parts of the Legendary Questline" portion of your guide. (Sorry if this has already been stated, I didn't read through all posts, just skimmed).Regarding drop rate with the buff, I had 2 Runestones going into buff period, and got my remaining 10 running last 2 wings of ToT/1st 2 of SoO. Last one dropped on last boss I did for the week. From my perspective, that was a lot faster than what I had been getting pre-buff. Got lucky I guess.
This buff means nothing if the valor cap is still 1000/ week.... the A Test of Valor quest needs up to 3 weeks.... this buff is up for only 1-1,5 week....so what's this? another bad joke? :/ valor cap should be raised up to 3000/week for this time (till this buff is up) so new players / alts can still benefit from this nice thing ...and raising up the valor cap for 2 weeks isn't a big thing...i think.... :)
To be fair, I seem to recall a tweet where they said they liked how these little boosts have been working, so maybe we can expect more.