Well, they already did:
(a) Should the Government guarantee bank deposits in a future economic crisis
like what it did post 2008. - Yes, the $250,000 limit stays.
(b) and if so should the Government charge the banks for this service
and/or back charge the banks ? - The charge would amount to about ~0,03% points of the prevailing interest rate. The banks would simply pass on the fee to interest paid on deposits.
(c) if not should the Government announce that forthwith? - The government will not go ahead with the scheme as it was proposed.
As for Cyprus, all capital controls have been lifted.