FFG announcement article: https://www.fantasyflightgames.com/en/products/xcom-the-board-game/products/evolution/
 
Things that can be gleaned from the article:
 
 - Exalt are represented by tokens that can be added to and removed from the board, and make tasks Dangerous while they're on the board.
 - There are at least 3 plastic figures.
 - There's a 6-sided Threat die.
 - There are at least 2 new Missions with Meld - and one of them has an additional text condition associated with its first task.
 - There are new alien cards - though they might just be replacements for existing aliens.
 - There's an entirely new small card type.
 - There are "destruction cards" associated with the Annihilation invasion plan.
 - There are new Tech cards - including one that adds yet more competition for the Central Officer's Satellites, and one that can deal with EXALT tokens.
 - There's a Meld Token that shows which Missions are eligible for an extra reward for speedy progress (the example has the Meld reward for the second Task).
 - The Chief Scientist has a Cybernetics Lab that has something to do with MEC Troopers.

I'm not sure if you accounted for this or not, but here's how you assign soldiers and figure out the dice, using your 
 
I'll use your example with that Sectoid Commander and I hope this helps;
 
The monster has Positioning, Critical and Teamwork icons
You can assign 1 soldier to each icon, for a maximum of 3 soldiers attacking the monster
You chose a Sniper (gold Critical), Support (gold Teamwork) and an Assault (gold Positioning)
 
So here's how you would add up how many dice you're rolling;
1 die for each soldier assigned to an icon; in this case it is 3 dice 1 die for each matching specialized icon; if the soldier has the same gold icon as the monster, add a die 1 die for each elite soldier assigned to an icon You would only be rolling 6 dice in your scenario IF each icon on the monster card was also gold.  So looking at the two Sectoid Commander cards I have in the game, all icons are white, with no specialized icons, therefore, unless you had an elite soldier, you would only be rolling 3 dice in practice.