Personally, I think a Lego themed area for CCL could be great, IF DONE RIGHT.
Could bring in the demographic that is too old for Cbeebies, but not yet ready for the big coasters (and Nostalgia almost 50 something's like myself - all I got for Christmas was an apple, an orange, a nut, a price of coal, and one Lego brick). Oh, and the first person to say, "YOU WERE LUCKY"... I DARE YOU, I JUST DARE YOU!
A few vinyls won't do it though. CCL would need half a dozen prices of semi decent, new, well themed ride hardware, and a stand out attraction (Lego themed log flume of a decent length - not end of the pier material).
Or Log Flume Dennis's Space Jam themed, Launched, Vertical Drop Log Flume in the Dark.
Respect bro - not ever Uber Genius John Wardley came up with that one,!