I think its a great idea myself, the slide looks like it will really help spread some people out in Splashin Safari. I also think they really need the two lazy river that they do have. Anytime its warm, the place is packed, I could not imagine what it would look like if there was only one lazy river still!
I am sure pilgrims plunge will get all its kinks worked out, it is an intamin, hopefully it does not take several years like top thrill.
I am excited to hit up the new ride next year, I am also looking forward to some nice cool fall Voyage rides.