through feedback, the beginning mobs on makeb have had their levels reduced, and will be an easier transition for "normal" (not fully raid geared) lvl 50 players.
current BiS DG gear is actually good all the way up to 55. I made it to 55 with only replacing a belt. At 54, some of the blue items started looking pretty good, but not quite good enough to break up the set bonus on the DG gear.
correct - but one thing that isn't gear related, but directly related to the leveling experience, is the mob density on Makeb. I personally LOVED the planet, but there were several places where the number of mobs within a group become the challenge, rather than just your gear. I suspect people in lesser gear will have to be creative with CC and kiting..