In full agreement, I would like a dev response on whether the tiers have to be completed IN ORDER, or if I can work on leveling the various toons to 50 all at the same time and worry about the tacticals (for example) later. Right now I'm hearing it both ways, and it is pretty vague.
I'm willing to put time in to try to hit the Legendary Tier, but if I get screwed out of it because I accidentally complete something that's a legendary goal too soon, I'll be a little choked. OK, a lot choked...it is a lot of time investment.