It's really overly bright and vibrant this Eternal version.
They do explain some of the the changes to colour though.
Ammo drops are now colour coded so you can quickly identify the type of ammo, and the weapon wheel is using colour as visual aid to give an quick indication of ammo levels for each weapon.
(I just hope they do add some additional shading and detail to these dropped items so they look a little more real and less cartoon like).
They said that ammo in general will be a little less abundant this time around.
Also sounds like they putting a lot of thought into weapon balancing and how demons will effectively resist and counter based on the weapon you use.
Crouch is gone, a grappling hook that pulls you towards objects in multi vector way, movement dashing, wall climbing and post swings are in.
Shoulder mounted secondary weapon means you can keep firing you primary weapon at the same time.
Forearm mounted cutting blade for more deadly glory killing (would you like one slice or two sir).
Instant death respawn when you have the 1UPS in reserve.
Nah I have complete trust that they know what they doing.
IMHO we could be in for an master class showing in the frantic non-stop FPS genre.
This vid shows some of changes from the earlier dem versions.
[EDIT] Pre-ordered from CDkeys.