I think the key thing is a person's ability and desire to evolve with the band, the members' ages, and their playing/singing ability. It took me a bit, but I've accepted that Tate simply will not sound like I remember back in his prime. The damage done to his voice is what it is. There's no going back. So if you can accept that and still get enjoyment out of what he CAN do, then you focus on that.
It's the same with Queensryche's evolution with the original lineup. Some people just liked the metal years of the 80s. And I get that. And after that, they checked out. Totally understandable. But as the band evolved, I evolved with it, and continued to appreciate it. Not everyone could. TAC, who is a great guy, and has great taste in tunes, generally checked out after Empire, because PL went down a path he didn't dig. And I get it.
So applying the same to what exists now with Tate, and separately, Queensryche, really helps. If you get some enjoyment out of something, embrace that, and don't dwell too long on what the performance ISN'T. Lord knows I have my nitpicks of both Tate and QR these days from a live perspective. Certain things not sounding good to me, etc. But those songs are, after all this time, just as much "ours" as fans as they are the band's. And if you love those songs, and have the ability and desire to overlook some limitations in how they are now performed, then you can find enjoyment in it. And if you can't, then obviously just don't buy a ticket. Took me waaaaayyyy too long to get to that in my mind, which is a shame.
I'm looking forward to Tate when he gets to my area in the fall. No, it won't be vintage 1991 Tate, and no it won't be 2005 Tate when he was upping his game when sharing the stage with Halford. But Tate will have his moments, and his band will improve, and it will be fun to see all of Rage and Empire performed live, along with Last Time in Paris (which I've never seen live by any incarnation of the band).