I think the dev team did more than enough to compensate for the reduction in force stun range by making force speed a root breaking/ CC immune ability. It is a little OP now IMO, so I don't complain at all.
I really have not noticed the range of Force Stun being an issue;
I notice it all the time, and just tonight I noticed it in PvE as well, basically where I wanted to stun an npc that was dealing damage and the tank was taking a fair amount of damage. So had to run 20m just to stun the npc all the while I'm supposed to be keeping the tank alive and falling a bit behind.
It is unfortunate when what is likely a 'pvp' nerf ends up hurting PvE.