I haven't read what you're referring to, but one Apple employee I know uses Digital Touch pretty often (he says he uses it to silently attract the attention of other people at meetings, and I've seen him use it to send doodles to his friends). Why do you think it sounds painful to use?

Verge review calls it "remarkably small-time" and "a weird thing to hype as much as it's been hyped" -

"But here’s the thing — it doesn’t happen in real time. I had assumed that sending a heartbeat meant that my recipient would just start feeling my heart on their wrist like some sort of cosmic love connection, but that’s not how it works. Instead, you get a regular notification which sends you into the Digital Touch canvas, where the message plays back: the taps come through, the drawings draw themselves, the heartbeats beat."