If by dynamic you mean repeatable then no. Fix and or finish the content, yes. Balance the BPC's, yes.
Each Cosmos Agent mission series offered is a specific storyline mission offer that gives a large Faction standing increase when completed. Only available once in the life of the character. Keep that as is.
The Epic Arcs is a much longer series of missions that can be repeated every 3 months for Faction standing increase. Keep that as is.
Over the years there's been lot's of proposal's written about Cosmos which end up getting passed over for other proposals about CSM, CCP, NEX prices, etc.. http://www.eveonline.com/ingameboard.asp?a=topic&threadID=1354195
This is just one of the many Cosmos proposals that got passed over.