That's how it works now – you can book as many time slots as you need for your tasks. From my personal experience tasks take more than a single slot quite often.
For me using Asana as a personal tool wasn't really comfortable – there are no notes (at least there wasn't back then), you have to manually assign all tasks to yourself and there is no calendar integration.
Well, we started to build it for ourselves and our own needs. It all started from my personal experience being an Engineering Manager at Bumble where I had to manage multiple priorities/projects and go through 40+ meetings a week. Then we opened for the public access and started to see some interest from other people.
Anyway, you're right, it's a long road ahead of us if we want to be competitive on this market.
That surprises me. As an EM myself, I don't see this keeping up with my task load. I assumed this was targeted at junior ICs who may not have their workflow figured out yet. I wish you luck.
No, you'll retain access to your data. We switch accounts without a subscription into a read-only mode.