According to TechFlow, Cosmos Hub announced that Proposal#914(v16 software upgrade) has been approved and Cosmos Hub will perform v16 upgrade at block 20440500 (May 15).
It said v16 includes new key features enabled by upgrading to SDK v 0.47.
-IBC rate limiting module: prevents a large amount of IBC tokens from flowing in or out in a short period of time, adding an extra layer of protection for IBC transfers;
-ICA Controller submodule: enables Hub users to perform operations on other chains using their Hub accounts;
-IBC Fee Middleware: Supports creation of IBC channels with in-relay protocol incentives.
In addition, v16 also upgrades ICS to v4.1.0-lsm and introduces the ICS period to reduce the relay cost of ICS.
