There was a semi-serious thread in Beta about new achievements for Entrenchment, however some of the existing ones might use another visit. 

I've almost got all of them, the most tedious were the pirates and the researcher achievements.  A thousand pirate ships is far too many, you have either to play hours after a game has 'ended' just to get the achievement, or make a custom map with a fabulous number of pirate planets.  The researcher achievements might be more fun if you just had to get all the tier 1-3 ones first, as the military ones seem to involve a succesful rush then another boring wait. 

These ones seemed out of line, the others can be done in the course of a standard game against several hard AI.  What I would also like is a record of which maps I've won at hard level or above with all the opponent slots filled.  The simple defeat x number AI opponents achievements seem curiously limited as well- how about 5-9 as well, and also types, whether races or combat styles?