You're really going to look to the popularity of Dueling...I mean Dragon's Challenge as an argument?
. And in case you haven't noticed, people in fact don't like the rampant use of omnimovers and the like in WDW. Hence the tepid excitement for the Little Mermaid. It's also been discussed here, how without improvement to the Mummy, it will pale in comparison to Gringotts. Will the ride die? No. Will normal waits of 35-40 minutes drop to 15-20? Absolutely.
I think a decent argument can be made for both sides, since this isn't a case of say Haunted Mansion vs. SSE, but more like Indiana Jones vs. Dinosaur. But, and this is a very important but, I think the new technology and the fact that at least some changes already have been made to the storyline, tip the scales in favor of this being a good thing.