I like the early pirates okay, but I think they should disappear after say, 50 turns. 

There are ongoing problems with the pirates that can be fixed but in this period of getting the game ready to release there are probably higher priorities.

• The pirates still cause occasional game crashes/freezes for various reasons.
• Each faction has it's own way of fighting the pirates and some of those ways don't include firing their weapons.
• The ships often just drift around in an unrealistic way. Especially the surveyors pre-made for the role. Custom made, better armed ships seems to perform better.
• The battle viewer experience is underwhelming and detracts from the experience involving multiple fleets on both sides.
• After 5-6 pirate encounters, you know exactly how it going to turn out and auto-resolve becomes the obvious choice.

I'm not sure if they intend to leave the anomaly pirates in the final release, but some of the above might be worth considering.