I hope it doesn't "go back", but that they take the positives and keep them, but are able (once back log thins out) to pick up the positive things that aren't happening.
For me, I think the telephone appointments have been SO much better than sitting in a waiting room (filled with other ill people) waiting for an appointment. On the occasions I have needed an appointment over the last 2 years, it has been great to be able to stay at home and wait for the phone call, being able to either get on with work, or, when needed, rush to my own toilet (TMI!). Equally, my dc away at University has been able to get an "appointment" with our GP rather than having to deregister (tricky, in the middle of ongoing medical situation) and find somewhere to register at University.
I do, of course understand that just because it is better for me, doesn't mean it is better for everyone. I am fortunate that I am registered with an excellent GP. But pre-COVID there were always lots of people who didn't have that privilege.
So, same with work (for many) and lots of other things - let's take the things that have been better, and keep them, and let's pick up the things we've missed. "Going back" is rarely a good option.