If so how will NXT get down to instant transactions? Also what do you mean by decentralized vs centralized and which one would be better?
In Bitshares users vote for a pre-defined number of delegates (forgers in NXT terms).
In NXT it's a randomized process of who forges the next block and there is no pre-defined number of forgers, no voting.
When TF is enabled, the system will be able to predict who forges the next block, but it should still stay randomized as to choosing a forger. Predicting the next forger makes it possible to implement Instant Transactions.
Well, obviously, decentralized is better, because that's the general and primary purpose of crypto currencies, isn't it?
In designing a crypto special emphasis should be on keeping it as decentralized as possible, keeping it as close to peer-to-peer model as possible instead of designing something similar to server-client model, which leads to centralization, but gives an advantage of short block times.
