Nahh, you've got it backwards, a photographic eye is not necessary with digital.
With film you had 30 chances per dive to get it right. With digital you can easly snap a few hunderd shots on a single dive. One of them is bound to be good.
Ah, the lotto approach to photography.
I've entered one-day beach dive photo competitions (with film and digital categories). Many of the digital entrants shot 200+ images in 3 or 4 dives; one entrant shot almost 500 images. (the only digital shooters that consistantly place normally shoot around 50 to 150 images and have practiced extensively) The problem is most of the photogs are just shooting snapshots/grab shots. Even if the photographer gets a winning image (mostly, just blind luck for the lotto photog), they don't know how they got it and couldn't repeat the shot.
A good photographer will produce good to great images with their practiced/finely honed techniques in a very consistant manner (if they can find subjects to shoot).
The photographer's eye =
Technical:
focus, exposure, lighting (know what your equipment can do and cannot do)
Artistic:
Composition, Peak of Action, Point of focus, Lighting for affect
(All of which can be learned, previsualized, planned, and practiced)
The instant feedback of digital is a _huge_ advantage over the old days of shooting slide film (where if you're lucky, you get to see slides the same day you shot them).
Use all digital's advantages (instant feedback, histograms, 100+ shots/dive) to improve your technique every dive. DON'T just shoot the same old "broken" snapshot over and over.
Look at you images critically, make a list of errors, rank the errors, work on fixing the biggest error, when it's fixed, fix the next biggest. (repeat until you've fixed all errors)
Take Care,
ChrisS