I personally like to play RD with a left handed shot for better one timers and interrupting the puck in the middle of the ice but I don't think there is any right or wrong way to play in this aspect.
From what I've seen, Hand Eye is mostly an offensive trait as it allows for much better tips and receiving hard and high passes though it stands to reason you could better snag saucer passes but most people don't use them much. On paper, it stands to reason you would start pumping stats into the dedicated shot block skill but from experience, I honestly don't think it really makes a noticeable difference - I personally remove as many points off of it as I can since I don't care about the different "types" of blocks you can do and its very rare to see a shot keep you down on the ice for too long. I don't really like the L1/LB pass block variant all that much either - It becomes slightly faster to initiate with a higher stat, sure, but overall I find it still slow and there are times your stick might not even touch the ice (or they can just saucer over); I think better line of sight and just planting your body is the better call.
The absolute most important stats for a dedicated D man, in my opinion, are stick checking and defensive awareness. The tensile strength of high stick checks makes it easy to sweep pucks and awareness affects loose puck pickups, interceptions, and I believe it helps plug any holes when making a block attempt.
Holding the stick out and sweeping to a side can help direct a puck but that is one of those high skill ceiling kinds of plays and can slow your player down quite a bit if you miss - I personally only go for the full extension when interrupting a slapshot