While surely it's made to get more money, think about all the people that clear a raid in some weeks, farm it for some months and then get mortally bored.
With a daily reset, they'll clear in 1 week, farm it for 2/3 weeks and then QQ forever on the forums about how much they're bored to do the same raid every day with nothing new for the next months.

If you get geared too quickly, you'll be bored, thus you might suspend your subscription. So yes, it's an artificial cockblock, err, "pacing mechanism" that serves financial motives.

"they're planning on making it so that you would only be saved to an instanced when it's partially or even completely cleared"

Where are you getting this crazy idea? Blue has never posted anything close to that anywhere I have seen, and none of your links contain anything even similar to that idea.

Did you come in to work drunk today?

It's far more likely that they will either:
A. Give a lock confirmation window if you're about to be saved to an instance.

or

B. Save per boss instead of per instance.

Of course I'd prefer B, but A is far more likely.

Ummm! raid ID's aren't a problem as such. in fact they're great, they're not a Blizz conspiracy. They exist so we can run a raid, kill a few bosses, wipe on one of them untill raid time ends and try again the next day without having to restart from scratch.

The real issue here is raid resets and why're they're not so frequent... The point here is that raids can't be automatically reset regularly or else there'd be no point in saving them. What's the point in a raid ID that lasts a day or so when your guild runs once every 3 days, the automatic resets NEED to be quite long buy their very nature.

So what about adding manual resets into the mix aswell? Well firstly who controls the manual reset? Only the raid leader? Everyone in the raid? Potentially giving everyone or only one the power to make or break 25 peoples raiding. It's an odd concept and it makes sense that resets have prefixed times.

So what about getting saved to raids? Well this is the real problem for the majority of people in the raid... it makes sense that Blizz would try to fix this rather than remove resets. (I guess you guys forget that not everyone clears all raiding content in a single night)

They may aswell make the raids save per boss as they do in heroics to be honest... but then ofcourse we could farm trash... Solving this problem would be to remove decent drops from the initial trash or putting a boss at the entrance to every raid.