As for the renovation I'm unsure if TLC has the budget to fix everything that is wrong with duel because the list is long and obviously they have to pay for SW8 this year, but I hope if they can not do it all at once they will do it progressively like the nemesis station or fix the worst bits that are broken.
Yes most probably, unfortunately.
Duel Live's weakest parts were the actors, they didn't really add much to be honest, other than hitting things to make you jump. What really made it work was the MUCH more fitting music, which added a really ominous feel to the whole ride, the improvements to the lighting that were done at the time (ruined again now), and with the lasers turned off it was widely noted at the time how the effects were MUCH more, well, effective! Parts actually made you jump for once, even though it was still pretty busted compared to its early Haunted House days.
Plus it would regularly get a 30-60min queue during Scarefest in those years, not at all like it usually pulls. It really made a difference not having the ride just forgotten about, giving it a new draw, the lasers gone and the lighting & audio improved.
After that, I believe there was a propsal for doing a proper redo at the time, without the guns. Unfortunately most the management since that time who oversaw the experiment have gone and it seems we're back to this same old situation . Skelvin's Haunted Adventure wasn't nearly as good, even though the Danny Elfman Beetlejuice music was fun.
Shows what a difference proper atmosphere and lighting & audio makes.