Here are some bite-size notes on the big changes in V2.

White

• Less Prison/Stax
• More Aggro
• Higher quality removal

Blue

• Less Storm creatures
• Less creatures that gum up Aggro
• More Kiki-Jiki combo
• More Tempo

Black

• Less Storm
• More Aggro
• More Hand Disruption
• More & higher quality Reanimator

Red

• Less Big Red
• Less Storm (you seeing a theme?)
• More Aggro

Green

• Less Aggro
• More Ramp/Midrange

Multi-Color

• More interaction

Colorless

• Less Storm
• Less Eldrazi
• More flexible options

Land

• More answers to problematic lands

General decisions on this update:

• Support Aggro more heavily in white, red, and black. Removed clasms and low costed big toughness to make sure it can develop and win in its crucial turns.
• Beefed up Reanimator's viability and support, while streamlining its targets.
• Storm had no payoffs but a bunch of foundational pieces that did not fit well into other archetypes. Cut Storm altogether. Too insidious and fragile.
• Cleaned up green to be more Ramp and Midrange, less random aggression.
• Focused Tinker/Channel/Sneak Attack style decks with more streamlined targets and more support.
• Pulled Big Red down to focus Red on Aggro and it's ability to use Burn to close out games.

Still a lot of changes to be made, but this was a big one!
Thanks for reading.