I guess I'd put the blame on the amount of posts I read every day and the attitude towards new goblins, which is "You should do this". What they need is a proper education in gold making, they need to understand the process, and not learn about new sources, cause then every time a source dries up, a farm is nerfed, they come back here to ask the same question. "This died. What now?" or "I'm at 500k, what now?" And that's why I'm annoyed. But then again, to each his own, I'm not the one in need of help...
Special note: The two Darkshore changes will only take effect after the current Warfront cycle has ended. So if Alliance is attacking Darkshore in a given region when Season 2 begins, and has 3 days left in that attack cycle, that Darkshore will still give Season 1 rewards. ◦This is being done to avoid any unfairness to people who had already completed the Warfront or done the world boss just prior to the season rollover.
One of the most profitable ways to farm in patch 5.4 is to buy Potions of Luck from the auction house and head to the Vale of Eternal Blossoms. In the northwestern corner, specifically the Ruins of Guo-Lai and the Guo-Lai Hills, there's tons of mobs that can be aggroed in huge groups and AOE'd down. The Potion of Luck will increase your chances of finding loot on the monsters, and these mobs in particular drop good crafting mats, Skycrystals, motes of harmony, and Gou-Lai keys. Many guides tout this as the greatest way to farm gold; depending on your ilvl and clear time, you can earn anywhere from 2.5-7.5k an hour.
Other than that, it would be even better if we could get craftable gear up to raid level by obtaining rare materials found in raids/raid bosses (So if for example you raid on heroic, then you can upgrade your crafted gear with these rare raid materials to heroic level). I really liked going through raids not only for loot, but for rare crafting materials back in TBC so I could craft Stormherald/Lionheart as it gave crafting some solid meaning other than being there for the sake of having pre-raid / alt gear that is replaced easily.
But then you have some professions, Inscription, Jewelcrafting, the gathering professions, etc. which don't seem to have any specific extra bonuses for being them. Inscription has been in a bad place for a while and that trend seems to be continuing in BfA, although considering we are not locked to certain glyphs anymore (like having to choose between only one glyph of many for things like Travel Form) I suppose there's a chance we will see some more profitability out of it.
There's a few profession crafted pets in BfA on the horizon - Battle for Azeroth Tailoring is getting a Hot Air Balloon style pet, and BfA Alchemy looks to be getting a brand new Transmute Meat to Pet. There are some mount buff consumables from both BfA Leatherworking in the form of a mount barding, and Blacksmithing in Battle for Azeroth will be able to craft Stirrups and Hoofplates to increase mount speed and allow you to interact with things while mounted.