triple battles arn't really sitting well with me, but I didn't like Double battles either and they don't bother me in game (due to there being so few of them). hopefully they don't pump the game full of double and triple battles, just to show it off.
the new Pokmeon, while overwhelming at first, definitely grew on me.
Mantis dragon - I really don't like it's colour scheme, but it's overall design is no more outrageous then Tyranitar's. Looks to be part Bug, and by it's overall look I would say it's the Psudo of this gen.
big Mole - I... really don't know. I think moles are bad ass, so that's a plus, and it's claws are neat... but it's metal head thing. it protrudes, and looks pretty odd. not really bad, just sort of awkward looking. chances are I'll like it once I see official art. I'm thinking part Steel, maybe Steel/Dark. it's prevo looks pretty good from the back sprite, though.
Sarcophagus - it's awesome. I love it. a lot. it's just so goofy; it has the shadow hands all wiggling around, and it's a fucking SARCOPHAGUS! I want one. obviously Ghost type, maybe Rock or Ground in addition to that.
Spider - can't really get a good look at it, so I can't judge. apparently it's electric/bug, which is cool. so yeah, I'll wait on this one.
Green slime thing - unlike a lot of people, I love this thing. it's adorable! it reminds me of a genie, or a pollen cloud. I would say Grass, and based on it's overall look, Grass/Ghost.
spiky rock thing- I don't even know here. it has the same colours as Probopass, and seems to be made of rock, but overall it doesn't look like it. more like Metagross in it's stance and legs, but it's body is kinda different... I don't really like it... obviously part Rock type, but Rock/Steel is likely, which makes it more like Probopass...
layered dress girl pokemon- looks pretty alright. I think it will be a new Pokemon, and not an evolution of something else (though if it was, I would guess another Krilia side evo) if I had to guess, I'd say Dark/Ghost or Dark/Psychic.
even if people don't like the designs, the amount of content and gameplay features they are adding is enough reason to still buy the game.
EDIT: Notice how in the triple battle you're fighting the female main character? either this is a Wifi battle, or that the opposite gender character is going to be your rival. (or at least can be battled in game without being a full rival). maybe there is more than one rival? I want that.