According to Final Fantasy XV director Hajime Tabata in the official forums, the current automatic weapon switching system with a real-time weapon battle system.
This weapon system allows players to set the four main weapons to be switched between in real-time, by using the each button on the directional-pad.
As a result, the Break → Rush → Slash system has been changed from the Episode Duscae demo in order to prevent accidental switching to the automatic system during regular attacks.
When it comes to “Counter” or “Raid (Jump Attack),” if the player has not set a weapon then normal weapons can be used. However, you also can automatically switch to weapons specifically made for these attacks in the demo.