Hi mate. It is lateny, try to stop alittle bit before you move into an enemy and let them catch up before you move the last feet in for the nuke. You will see later in Arena that this problem is more or less gone as of the little latency in there. In BGs and in the world you will have to deal with it as it is.

If you get trubble in major citys that one fall behind (stop follow) then startt to mount your alts but not your main. that usaly sole problems like that... Like i would mount my alts and go travol or ghost wolf form on my main druid or shammy due to who i use atm.