First off, I think this is a great game. It's had me hooked for months now. I play on IPad, by the way.
I wish there was a way to speed up time faster than 2X. Now that I've played through the campaign I'm just playing on my latest world, trying to see how long I can last, but even at 2X it takes quite some time to get to the next wave of enemies.
Also, I think a mode designed more around the tower/base defense aspect would be a lot of fun. That's what I'm kind of doing now, but like I said, 15minutes or do between waves of enemies is a bit long.
Naming and being able to customize each dwarf's appearance would also be great. Being able to easily differentiate between your different specialists just by looks would be very helpful, especially when playing at faster speeds.
Oh, yeah, one last thing. I wish there was a way that you could specify who to send out to attack enemies when you click on them. Having all 14 dwarves drop what they're doing to chase down one Orc on the other side of the map really disrupts things sometimes.
Thanks for listening and for a great game!