Olivier,  I am glad to see you mention this. You are taking a sort of "zone approach" and picking the middle ground.  I would like to see pics of how it works out throughout the shooting time.

As for me, once in a while I actually disregard the in-cam meter or hand held meter and shoot using simple guidelines like the "rule of sunny 16'".   With some practice, using the mind and basic common guidelines as you employed,  exposure is quite acceptable.

I believe it is a good excercise to go to the field and shoot many images using the mind and experience as the meter, avoiding the in-build technical electronics and actually testing our own ability to read acceptable exposure.  When I have done this, not often by any means, I have enjoyed the test and find most images within acceptable ranges.

Ahh..the easy pitfall of depending on the tech stuff and not thinking exposure and result...so easy to fall into the "easy way" and miss the chance to do it ourself manually and with often surprisingly fine results.      Thanks for this post.      Tom.

P.S> I am by no means a purist and b elieve one way is better than another since I shoot mostly with camera metering, tempered with my own feeling at the time.  But, this does work and is worth trying for anyone with manual capability.