I just read the Apple Website update on the HR monitor and, frankly, I don't have a problem with it. Let's think about how this works, instead of just assuming these changes are bad.
1. Automatic HR every 10 minutes while at rest - nice feature to see if you have accelerated HR for some reason.
2. Manual HR contiguously read from glances anytime you want to check it - Excellent feature that is extremely easy to use and user specified. This could be used after exercise to check recovery or any time you are active without using the workout App, just by a simple glance at your wrist.
3. Continuous 5-sec HR readings during workout using the App. - If you are going for a walk or any other exercise you want to track and record you can use this App to do it. For instance, if you were going to mow the lawn, and wanted to track it, set the Workout App to Outdoor Walk. This is the time that HR is contiguously monitored and is useful in determining your workout intensity and calories burned.
Your activity during the day is still tracked by steps, etc., in the Activity App, even though you don't set the Workout App or have 10-min HR. And think about it, how useful is 10-min HR during activity anyway? Let's give Apple some credit for determining that it just isn't that useful. They have experts working on this stuff and know a lot more about when and how HR should be monitored and how useful it is than we do. They have given the us the flexibility to check HR anytime and record HR during exercise in a very easy and convenient way.
If you disagree with my opinion, post some sound reasons why the updated HR monitor isn't correct or useful when you ware the watch correctly... thigh on your wrist, just below the wrist bone.