Yes, I was definitely naughty, and did my own tests. The only real value that the clinic provided me with was the ability to have a monthly blood draw to which I was able to compare my meter's results.
The idea of 'weekly total dose' doesn't make a lot of sense to me, either. If a person should be taking 49 mg/week, the extreme would be to take 49 mg on a Sunday, and nothing until the next Sunday. Ridiculous, I know. But so is increasing a dose (perhaps taking a double dose) one day a week, and expecting the spike in INR to last for an entire week. I've always advocated for the SAME dose if at all possible. (There were times, years ago, when I would alternate between 5 mg on even numbered days and 7.5 mg on odd numbered days. This seemed to keep my INR pretty stable, although I probably had a slightly different INR depending on the day of the month the test was made). This may have been almost as effective as taking 6 mg for six days and 7 mg on the seventh day. (In order to get 6, I would have had to take a 5 and a 1 or a 4 and 1/2 of a second 4 -- it would have been a bit of a hassle and the difference in INR consistency probably wouldn't have justified the hassle).
I'm pretty confident that with the experience that many of us at this forum have with dosing management - and the availability of dosing calculators - plus the fact that it's OUR lives that we're dealing with, many of us are doing better than we would if we trusted the management to doctors or clinics. (Although I'm not advocating NOT using doctors or clinics, this may be something that some people may consider)