El Rio del Tiempo was great! A lovely mix between Small World and If You Had Wings. With some mystery thrown in to boot, from the awesome opening scenes to the ambition to tell the history of Mexico through dance.
Maelstrom suffers from Rohdeitis. Basically, all his rides suck. Too short (like Kali), relying on some gimmick (let's go backwards, just like Everest), too much 'story' (like Kilimanjaro) and too little downright fun (all his rides).
I wish I could like this twice... I think "If You Had Wings" should be the template for any attraction they add to World Showcase, "a stylized sightseeing tour with a catchy sound track", that's basically what all the best Disney rides are anyway. PotC, Haunted Mansion, Small World aren't like 2 hour motion pictures that are trying to tell some elaborate story, they're like music videos, they have really strong visuals, great music, and some simple premise can give the attraction some context, and sustain itself for about 5 minutes, like "all the birds sing words, and the flowers croon... in the Tiki Tiki Tiki Tiki Tiki Room" or "we have 999 ghosts here... but there's room for one more" that's all you need to know to enjoy those attractions
"Rohdeitis" is like doing the exact opposite of what makes the classic rides great, it's basically omitting any kind of stylized entertainment value or memorable music... and trying way to hard to convince the audience this stuff they are seeing is really "real", or being way too literal with the subject matter.
My main problem with Maelstrom has always been that the whole ride is "Vikings, and trolls, and mythology", but then it drops you down a waterfall into a room with an model of an off shore oil rig? that's the grand finally to Vikings and trolls show? That final scene should be like a Norwegian Valkyrie carrying souls off to Valhalla or something... some big spectacular, visceral, conclusion to the mythological journey we've been on. Instead there's this abrupt change of tone, and it tries to make some "real", literal, intellectual point, but it really comes off seeming kind of dumb, basically the ride ends by telling you "the Norwegian people don't just believe in trolls... they drill for oil too"... gee really? Maybe this weak ending is why people feel the ride is too short. Maybe the documentary style movie at the end should cover all the literal stuff, and the ride should just stick to being fun... and if they could figure this out for all the WS pavilions, find some strong visuals and catchy music from each culture, they wouldn't need to cram cartoon characters into WS to make it seem more fun