Right so let's look at this then:
Roserade - Cool and definately needed.
Ambipom - Looks a little silly, but hey, It's a monkey xD, Plus it was needed.
Mismagius - A Misdreavus Evolution was needed and it has a nice Witch-like Design.
Honchkrow - A Murkrow Evolution was needed and Honchkrow is a great flying type addition. But I can't help but think that it's design is a rip-off of the crow's in the disney movie: Dumbo:
Dumbo Crow
Weavile - A Sneasel Evo was needed and Weavile looks awesome and is a good speedy pokemon.
Magnezone - As much as it's a good addition to pokemon, but I do think it's a little unneeded, also I hate it's design, It looses the whole "Magnemites join together" thing.
Lickilicky - Lickitung needed an Evo...But I think they really mucked up. It just looks like a lickitung that Doesn't look in the mirror. Also It's tounge shrunk.
Rhyperior - Totally unneeded and has an awful design. And It doesn't really improve Rhydon at all.
Tangrowth - Good, A tangela Evo was needed and Tangrowth fits the bill.
Electivire - I like Electivire's design and I think it's a good addition to Electabuzz.
Magmortar - Fat Clown. But I strangely like it..
Togekiss - It's cool, I don't really like the design though and It's a little unneeded also.
Yanmega - Good, Yanma Needed an Evo and Yanmega has a good design and it can also be very powerful in the right hands.
Leafeon and Glaceon - They're nice additions too the Eeveelutions. But personally I think they should stop there with them.
Gliscor - Wow It's a really cool evolution of Gligar who needed an Evo.
Mamoswine - I'm not a fan really. I think it's a little unneeded and I don't like the design around the eyes.
Porygon-z - He he, I think it looks cool and has a Nice movepool now.
Gallade - Very good, Needed, Especially when Male gardeviors are just plain strange.
Probopass - Are you serious!? I can't even look at the thing it's just too ugly!
Dusknoir - Totally Unneeded, Plus it just looks awful.
Froslass - It's unneeded also, but yet it's pretty cool.
Wow there's so many!
The Evo's they stupidly left out:
Qwilfish - It's crying out for an evo.
Pachirisu - Why didn't they make an evo for this?
Chatot - " " " " " " " "
Farfetch'd
Kricketune - I think they should have gone one Evo further
Carnivine
Miltank
Tauros
Pinsir
Phew I think that's all.