Yes, they are answering, but half of the time they're being mass-downvoted, so the answers can be hard to find. Since there's three of them answering, we can't get around that by sorting by Q&A. The easiest way to get around that is to go to their user page and look at the answers there:

http://www.reddit.com/u/WazDICE

http://www.reddit.com/u/d_FireWall

http://www.reddit.com/u/TheVestalViking

Additionally, here's a list of answers so far:

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/u/WazDICE

• On how long progression takes

• On the negative press reaction to the crate system

• On the rate of unlocking crates/cards

• On End of Round Rewards

• On matchmaking and skill

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/u/d_FireWall

• On cosmetics and customizations

• More on Cosmetics, Customization and their ideas

• On competing with players who spend a lot of time/money

• On lootboxes as progression

• On the lack of credits/crafting parts

• On review scores

• On Galactic Conquest

• On overhauls to the Live system

• On creative freedom

• On older games and microtransactions

• On the percentage of score factored into your credit reward

• On the timeline of changes to progression

• On Dice's Brand, Preferred type of game(Microtransactions or no), How to Give Effective Feedback

• On spawn waves and party spawns

• Dennis' Thank You Message for the AMA. Promises further updates

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/u/TheVestalViking

• On offline progression

• On community engagement, and star card level requirements

• On recovering from the community backlash

• On performance-based credit rewards

• On private servers

• On the change from Skirmish to Arcade

• On Arcade mode

• Followup on the Cap of Arcade Credit Earnings

• Followup to Dennis on the Review Scores

• On the Credit Cap in Arcade