@OP:
Coin control in PoS currencies from the Peercoin family that use the "coin-age" concept (also Emercoin, Bluecoin, Novacoin ...) enables you to separate "old" coins from "new" coins. In these currencies, you can only mint with coins that were not moved for a period of time and your "coin-age" value will determine your reward (the longer you don't move them, the more blocks you will find). When you move these coins the "stake" value of these coins gets resetted when you move coins and you would have to wait 60 days again.
With coin control you can choose which coins to move. So you can keep minting with your oldest coins and only move those coins that you received recently, because these coins would not count for your "stake value" for the first 60 days.
An example: You received 10 coins three months ago and 5 other coins recently. Now you want to pay a bill for 4 coins. You should not move the old 10 coins because these coins are enabling you to get "PoS" rewards.
If you move these coins you won't be able to get rewards for them for 60 days more. Instead, with coin control you can choose to move the 5 new coins and use them for this payment. So you don't touch your old coins and don't affect their "stake ability".
In NXT and other currencies that don't use coin age coin control isn't that important.
I had 1575 PPC coins.
[...] losing 60 days sitting in the wallet .
I would have earned 1% or 15 coins.
Your math was not the best.
Peercoin's reward is aproximately 1% per
year. So you would have earned around 15 coins if you hold them 365 days. But in 60 days that would be only about a sixth of the yearly reward, that would be 2,5 coins. At the actual price that's about 1 US dollar. Was it worth the time to complain about these 2,5 coins?
Peercoin is also not really designed to get a profit from minting PoS. It is only thought as a small incentive to maintain you node connected. Not more. There are high-reward PoS coins, but they are very inflationary and normally lose value very fast.
