As usual, put in a lot of things into Mantis. Here's more of a few notes that weren't Mantis-esque.
Love the new combat UI. Much more efficient use of space.
Miss having the building bar up on the top left though. Not a big deal. The enemy still has his, so not sure why you took out ours (except that it is duplicating information in the bottom left).
Not sure if I should put in suggestions for sound effects, since I know they're not done. But, some useful sound effects would be:
1. Ship completed building
2. Mothership first blood drawn
3. Ship under attack - alert each time this happens after no such occurrence in N game frames?
4. Mothership ends it's command queue
5. Mothership shields low, down, hull low
Like the more low key stellar backgrounds. Easier to see gameplay elements.
Still not any good at strategies. I destroyed all the enemy's support ships in one game, and still lost despite having several (non-interceptor) support ships and my mothership attacking his mothership.