Overall, I honestly think this profession is 'ok' at best. But it's fine, we at least are made to work and grind for a great reward at the end of the toiling. But I've been at 525 arch for quite a while now and I've already noticed several problems with the prof that others have noted earlier (some that have not):
1) When you complete all of the commons and rares for a set race, you are still forced to farm them while getting other races. For example, I've finished both Night Elf and Fossils completely by farming kalimdor for the last week, and while completely finishing up both of these sets, I've only gotten 6 (yes, S-I-X) solves for the Tol'vir. This is mostly due to the fact that Blizzard implemented way to many Night Elf zones into the game...or...not enough tol'vir. I felt the same way when i was forcing myself to farm Nerubian archaeology; because 4 zones for nerubian and 24-28 zones for vykrul is very skewed in the wrong direction. Also, lets not forget that while farming for nerubian, you also have to farm Night Elf and Troll too. Honestly in the next patch when the limit on fragments is put at 200, zones from that race should no longer be able to spawn on the map, increasing your chances at being able to get other races that you are moving onto farming.
2) Scrolls/Obelisks/etc. are very skewed in drops. Some friends and myself ran tests to see the drop rates for each races individual keystone. The Nerubian and the Tol'vir, being the hardest races to grind for, have the lowest drop for their keystones. That really doesn't make sense if given some thought. If you spend all week farming tol'vir, you're lucky to get maybe 10 - 15 solves based on your luck with the dig site spawns, but then you only get roughly 3 - 5 hieroglyphs? Highborne scrolls have a rediculous drop chance. When i was farming the Tyrande's Favorite Doll I had roughly 50 highborne scrolls in a day and about 2 tol'vir hieroglyphs after everything was said and done (I'm still farming Tol'vir and the hieroglyphs still live up to their reputation of extremely low drop chances).
3) Balance out the dig sites please. Night Elves may have a myriad of sites in lore, but they don't need about 60 - 80 dig sites worldwide. It chokes the other races that you are trying to grind and prevents you from getting anything but Nightelf. They are seriously on every continent except outlands. In fact, Outlands was the best example of Archaeology that the Blizz dev staff has done. Two races, Dranei and Orc, both were perfectly balanced across outlands and it was relatively fun and easy to gather fragments for both races. Why? Because there WASN'T ANY NIGHTELVEN DIG SITES.
I'm not crying to you saying that his profession is hard, or "nerf it blizz, i cant get free lewtz!" I'm actually saying that this profession is a nice touch to the game, but it really needs some balancing. More so toward my idea in problem 1. I've been farming for roughly 2 weeks to get tol'vir and all i get is Nightelf zones and Im currently sitting at 1.5k night elf fragments with only 7 tol'vir solves. I honestly feel that this profession should be more user friendly rather than making it a grind-fest that completely defeats the purpose and overall mentality of making the game relatively casual but having some separation in a way for the hardcore players. But this is kinda torturous with the way you currently have it set up. I've been playing this game for the last 6 years and I've enjoyed the game for most of the time its been around, but this honestly is the first thing I've whole-heartedly disagreed with the dev team on. Please balance out this profession or you will honestly see less people take the time work on it. Please consider my ideas for future changes in this great idea for a profession.