The best fix for 1) for you is to not use unsheathe. It doesn't work in PvP because you cannot unsheathe/sheath in combat. You will also discover that unsheathe will not actually work in extended PvE for the same reason.

Make a specific jump keybind, I used X as my secondary keybind in game. Make that keybind only pass once every 3-4 seconds or so, and then have your autofollow macro call that jump keybind as opposed to sheathe/unsheath.

Now your characters will only stop and look the direction the camera is pointed a max of every 3-4 seconds, and jump works in combat to break the animation cycle which leads to the desync.

When I started PvPing with my sentinels, it became rapidly apparent that sheathe simply doesn't work so I had to re-evaluate and jumping appears to be the best solution. Limiting how often your characters will actually send the jump key also slows down turning spam so they fall behind more slowly.