This whole noise on acceleration feature is something they bring up in every hybrid review. It's like they have a checklist of points to make. The fact is, every hybrid does it. When I put my foot down in my RAV4 hybrid to maintain speed on a very steep S bend on the hill up to my village, my engine revs like mad but the speed stays constant. When I join the M62 going East at Jn 24, I put my foot down to match the speed of the trucks so I can seamlessly join the inside lane. Again, the engine revs like crazy to do this, for a few seconds. It is par for the course on all hybrids, in my experience, and just a quirk you need to be aware of but not worry about. If they revved high all the time, that would be a worry, but they don't.
I really like the look of the HRV and it is high on my list with the Toyota Yaris Cross. Nothing else really floats my boat but I will wait to see what the new hybrid Qashqui looks like when it is launched. Looking to change maybe next year from my RAV4. The 2005 Jazz looks like it will be with us to the end!