This Sentinel thing looks very exciting and interesting - great work! It could really increase productivity and make the governance system more like a real business structure. Great alternative to Ethereum's DAOs too, which are becoming popular and getting a lot of attention at the moment but still don't have such varied roles and structures.
But it could also lead to rampant corruption, cronyism, and people just living off their reputation rather than doing the actual work. I think this is a question that must be considered carefully:
Who can be manager? And how can we incentivize managers to make right decision?
Because in a real business managers answer to somebody (the CEO), but here there will be no CEO and I presume many of the employees will end up (at least at first) being people with other jobs and other business interests who work for DASH part-time, which only increases the risk of conflict of interest and so on.