While I personally prefer the older model, I am ever the one to vote for options, so I would say have both.
As one of those heretics who prefers a more organised Chaos that looks baroque and dark without this whole 'Mutated beyond Sanity' thingy, I do like the new Raptors too, and believe they're good enough as the starting Raptor look, especially because their plain look allows them to have room for customisation. I do however also think that the old Raptors (which really were the result of Raptors being fluffed as their own Cult-Marine-esque faction, IIRC) look immensely fitting (and cool) for what they are supposed to be, and coupled with their iconic look and that the general sentiment of the community seems to be "Please include both", I believe they should appear as either an Elite Raptor spawn, or mid or high tier Raptor customisation.
I have to admit i really hate the feet of the old raptors. But why not make it customizable to mix and match the pieces of gear so that everyone is happy.
Why can't we have both? This game is about customizing and creating unique loadouts. Slap a slight difference in speed or hight and decent speed and make it more interesting for players to adapt to different play styles ( not every raptor is killed the same way some even have meltas).
..Why not both? As the game will feature different kinds of equippable armour. I think there should be some armour sets themed after the old raptors. Even then i prefer the new over the old any day.
I definitely have a strong preference for the old style sleek avian looking beast of the sky, particularly that sleek jump pack. The barrel pack just doesn't compare.
I like the older Raptors. They look like more like the sleek predators they should be. New ones have "too much" going on them + I hate the "barrel" like jumppacks.