Pallas — there are people who seem very ideological about HT or HS. I came from teachers who encouraged playing HT (and pedaling) as much as possible from the beginning. But the moment there were technical problems, unless the technical problem was specifically about coordinating the hands, then the technical issues were addressed HS, without pedal. I think it’s much more efficient and targeted that way. If you’re having a technical problem that you need to sort out, I think this is most effectively done by isolating it as much as possible — and if your brain is working on a lot of other things at the same time, it’s very hard to isolate the problem and work it out and get it into the system. So, my approach is to practice HT as much as possible but when I encounter technical difficulties, to try to isolate them.
As regards voicing, I think a lot of the reason to practice the separate voices is to train yourself to hear the voices. For my brain and ear, unless I do this, it can be easy to ignore some of the voices, and that ends up coming through to the audience.