This is highly needed.
As far as I know, ChainSquad has no profits form the public testnet management, and it benefits BitShares as a whole. It's a fundamental for development, testing and for projects seeking for a platform to adopt.
On the other hand it's a relief for BitShares to have ChainSquad on charge of it, so I think worker proposals to have the testnet always up to date would be as fair as convenient for everyone.