When I heard about the level sync I was livid. I felt "how dare I lose the benefits of getting my main to 65. what was the point of all the extra hours!! blah blah blah!" Truth be told, it's an improvement.
On lower planets I feel like a powerful Sith as opposed to a God. Before when teaming up with lower lvl players I felt like a God amoungst ants. Certainly not a upper level Sith Assasin with less experienced sith, as it should be.
When you are lvl 64, enemies couldn't even hurt you which is stupid. Why should a MANDOLORIAN on Tatooine not be able to even scratch you, yet a common thug on rishi can cause all kinds of damage, just because 1 is lvl 30, the other is lvl 55? It doesn't give any consistency and is a bit out of sync with the Star wars Universe.
Also guess what?!?! With all the gear and abilities etc.......you are still SUPED up!!!. I find enemies on lower level planets super easy and have often teamed with other players of that level and the difference is more realistic (obviously this is a video game) but I felt my character resembled a Powerful Sith, playing with beginner sith as opposed to a God among insects. Same in places like Korriban where I do my recruiting.
Also I have sparred a lvl 16 character on Dromund Kass when I was synced from 54 down to 18 and it wasn't even a fair fight. I could still toy with him but I knew I could die if I did absolutely nothing which is far better. Being immortal compared to other players is silly. Even the Emperor could be killed if he doesn't defend himself. He has to force wrap himself from HK flamethrower which tells me that all characters should have some vulnerability. If an apprentice stabbed a dark council member with his saber, he could still kill him.
The benefits out weight the negatives I'm afraid. More consistency and also you get a better appreciation of your advanced powers/knowledge of the force compared with lower leveled players.