Agree, although it will depend on who we replace him with.
I reckon Marata at this stage of his career will only offer about 60% of what Ma'u brings so we definitely need someone else, at least short term. Not a lot out there that are off-contract but contracts being what they are, that doesn't really limit us.
I heard a name thrown about last week that if true, and if it happened, would be the signing coup of BA's career to date and definitely reduce the impact of losing Ma'u (dare I say might be an improvement even).