My recollection is that I was started on metamucil fairly quickly after takedown - probably 1 week like you. My surgeon believed that I should be striving for bulk as much as possible because, as it was explained to me, the pouch expands over the course of time. I remember also being told to resist the urge to go to the bathroom AS LONG AS POSSIBLE, which I assume was both to condition the pouch and the anal sphincter muscles.
I am surprised by many posts like this thread, by posters who have questions on issues of fiber, meds and diet and often with no solid idea of what to do, as if they have been left to their own devices. My surgeon, now deceased but at the time considered one of the best colorectal surgeons in the USA, had very strong opinions on everything from how the stoma wound should be allowed to heal, to diet, to fiber, to use of anti-spasmodics. I was given a diet plan which I was asked to follow and did follow with military-like discipline and frankly, it was implemented with military-like oversight. This is how things should be for everyone, but I guess they are not, and we see these posts from people clearly left to their own devices or else not having the benefit of good communication from their providers.
I agree that doctors have different views on these things but my surgeon's recommendations were similar or the same as yours, and just because you had a partial obstruction does not mean he/she was wrong. Don't fall into playing the blame game when something goes wrong, it isn't necessarily someone else's fault when a complication arises. Indeed, I had obstructions in the weeks after takedown. 2 or 3, and none in the 20 years since. So I would not get too crazy over it. It is an expected complication and should not deter you from adhering to an overall regimen designed to make you better, although whether it should be adapted for a period of time is something to discuss with your doctor.