One thing we can probably agree on with Indy is that the change wasn't necessary, really. I like it, but did it need to be done? Not really. It's still not perfect. They could just shut the lights off and stop trying to make lemonade out of lemons.
OR they could just straight-up copy the smoke ring effect from Tokyo's Indy instead.
Still, there's one change that I think they NEED to make, but didn't during the last refurb-the dart room. In Tokyo, there are dimensional, sculpted heads that shoot the darts at you. They don't move or anything, but they're clearly three dimensional, and it makes a difference IMO. By comparison, it's always felt a little cheap to me that at Disneyland they're all just painted on the wall and totally flat. That'd be an easy improvement I'd love to see in the next Indy refurb-and maybe DL can even one-up Tokyo by making fully dimensional bodies instead of just heads.