Here are some more discussions on the official forums:
http://forums.worldofwarcraft.com/thread.html?topicId=20677230833
http://forums.wow-europe.com/thread.html?topicId=11155812409
Pool fishing involves moving around, looking for specific things in the water. Pools are the closest we currently have to the Cataclysm method of fishing mentioned at BlizzCon (hooking specific fish you can see swimming). Encouraging pool fishing in this patch makes a lot of sense. In fact, it may be an attempt to demonstrate that a more interactive method of fishing can be popular. Although people here tend to mostly fish from pools, over all players open water is much more popular. So trying to make the least popular aspect of fishing more popular might be logical overall, even if we see things differently.
Of course leveling fishing skill (and specifically leveling alongside cooking) appears (same source) to account for a significant proportion of fishing activity. There's a risk of simply making the whole cycle pointless: Nobody needs to level fishing skill, so nobody fishes. Rationally, you'd counter that by arguing that if people didn't want to fish, they would not have levelled fishing skill. However Joanna Average WoW player transpires to be surprisingly irrational. "That 1/450 bar needs to be filled!" "One day I'll want to farm Mr. Pinchy..." I'm sure we've all been there, even if we find a reason to justify our actions. A superficial (or worse, pure economist) understanding of that irrationality is a dangerous thing.
Traditionally the role of fishing skill has been to test patience. Patience is the main requirement for fishing. And requiring 10 or 15 hours of fishing before an angler can catch the good stuff, is what separated "us from them". It's also classic EverQuest-style grinding, that used to be common in WoW: Do the same thing over-and-over, before you can do what you actually wanted to do.
Patch 3.1 started to dilute the test of patience. 3.3 dilutes it so far we're struggling to see a purpose.
The basic problem for fishing (and all WoW professions) is that there was never a hard part that followed the "pointless grind" of skilling-up. So removing the need for skill means that everyone can do it immediately. Consequently, there's nothing exclusive or special for anglers who are prepared to put a lot of work into the profession.
Or is there? Ah, but there is! At least for fishing. Take a step back and look at this forum. Or perhaps earlier in the year, when things were busier: The most popular topics are about catching the Sea Turtle, Pinchy, One that Got Away. Listen to the furvor with which people defend (or are annoyed by) the Salty title. All things that are a serious test of patience, and provide the angler with something to care about, something exclusive that is valued among those they play with.
Now, there are all kind of issues with this form of non-monetary, individualistic consumerism. And I suspect we'll eventually laugh at the paradox of how Blizzard's attempt to counter inequalities that exist outside of the game (by blocking Real Money Trading), has actually created one of the most unequal communities within the game (by trying to prevent the trade of anything perceived to have value). But that's a philosophical discussion for another time. We are where we are. And right now we're in a land where titles, mounts, and other apparently useless things have the greatest sense of value.
Why not go further? No computer-incremented skills whatsoever. Instead (if fishing still is a test of human patience) add far more apparently useless, but rare, things that take patience to acquire. (Rare doesn't imply strictly random - rare but less variable - for example a Sea Turtle might take 4,000-5,000 casts, not 1-~25,000 casts - excessive variability causes frustration as the mind either can't understand the pattern, or feels the pattern is unfair.) Or perhaps associate fishing with something other than patience.
There are lots of possibilities following this line of thought: But perhaps the value of fishing shouldn't be thought of in terms of the ability to catch buff food. Increasingly, the real prestige is a Turtle-mounted Salty with a Crawdad in tow. Or similar.