apparently it has only two new features which are getutxo and double spend relay enhancements.
and Core was not the original name also, XT is returning more to the QT path as a name...
OK was able to find more info on the github page: https://github.com/bitcoinxt/bitcoinxt
Bitcoin XT is a patch set on top of Bitcoin Core, with a focus on upgrades to the peer to peer protocol.
1. Relaying of double spends.
2. Support for querying the UTXO set given an outpoint.
Bitcoin XT is more experimental than Bitcoin Core, and has a strong emphasis on supporting the needs of app developers and merchants. By running it you not only provide additional services to the network but help build confidence in the implementations, contributing towards consensus for inclusion in a future version of Bitcoin Core.
XT uses the same data directories as Core so you can easily switch back and forth.
thx. i guess most people dont have a clue and this is the reason they are afraid.