That's my thing - I'm not against new ride systems, but on the other hand, I think there is too much emphasis spent on making unique special snowflakes.
I think 7DMT is a good example - with the amount of money spent on R&D for the "sway" feature, they could have likely afforded several additional show scenes instead. I would gladly give that novelty feature up for some more actual meat to the attraction.
It's almost criminal to me that they didn't do more with the EMV system, for another example. As you point out, no one complains that POTC and IASW are both boat rides with similar vehicles.