Deflation of a coin is not entirely bad, infact its good its good if it sets the coin back to its true value in terms of demand and supply,and the deflation is a means of correction especially when a coin has an over bloated price, extreme deflation is however dangerous and so are extremely high and overbloated price for a coin. both can lead to a crash
It will never get back to its true value because coins will always get lost, which means that people will stop using the deflated coin because it would be stupid to use something that has a deflation rate against something that has an inflation rate.
So people will hold instead of using, the whole financial system condition would be bad and the network is going to die because of lack of usage.
It won't do anything good for the coin at the long run.
Also, the ability to have a control on a currency is not a bad thing sometimes, it helps the government to protect it's citizens.