Since I'm banned from WoW's forums and have been for years, I can't post my suggestions that I think could make the game a lot better. But first let me get something straight about secondary professions, as I'm about to 525 all of them on 12 different soon-to-be level 85 characters and I want to know if it's at all worth it.
First Aid - Useless for Healers & Tanks
Reason: Healers have heals which do substantially more with fast mana regeneration, Tanks are constantly getting hit as will cancel the channel time of a Bandage, and have too much health for a little band-aid to matter
Cooking - Useful for all classes and roles
Reason: Food Buffs for each stat, and Feasts, Chef Title, Restores Health & Mana
Fishing - Useful for Cooks, and other extras
Reason: The rewards from Fishing are... Fish! Fish are used for Cooking, even though they taste nasty they can provide for good Cooking recipes. There are also Fishing Contests that can reward various items. Requires patience of course.
Archeology
This is what I need help with... I understand there's a variety of items that can be obtained through this secondary profession, but my question is... Is Archeology worth it as a Raider? Some of the items you get can be Mounts, Companions, and Gear. But remember in Wrath when iLevel200's went so far out of date that we just jumped from Questing greens to 232 epics? Right now the gear rewarded from this appear to be iLevel359's, but won't these get replaced quickly in future Tiers? Will this make Archeology useless to a "Main"? I'm debating on whether or not the hike to 525 is going to be worth it in the long-run, or should I pick this up on my Achievement Character (100 mounts, 30 tabards, Violet Proto, 50 Exalted, 100 pets, Loremaster, etc) - yes I have a separate character for Achievements.
My Suggestion, for Blizzard, would be to update Archeology, and add items in the future to make this secondary profession worth something. I doubt their intentions are to introduce a Profession that turns from Useful Rewards to casually cosmetic. None of the other professions "died" in this way.