The 8th Ed. LOS rules were annoying to get used to when the 8th Ed. came out, but now it's just 2nd nature (and its not nearly as bad of a change as first feared).
Skirmishers have a formation now and no longer have 360 degree LOS. 360 degree LOS is basically gone from the game. Front arc is where LOS is now determined. Basically if you try to look from the eye level of the model in his frontal arc you can easily tell what he can see (and whether it has cover or not...if that matters). Modifying your model to be taller or shorter will matter for determining this. However, if you modify your skink priest so he can see enemy units from behind your saurus unit, then the enemy can likewise see your skink priest behind the saurus unit. It'll act as a double-edged sword, so it's fair either way (I wouldn't go crazy on modifications, you still have to 'justify' why your model is modified a certain way...you can't have a skink chief on foot that is 6" above the table surface, unless he had the Cloak of Feathers and is not currently in a unit, he'll have to land on the ground to be part of a Skink unit for LOS purposes.)
I haven't found any arguable cases concerning LOS other than determining whether an enemy lies within the frontal arc or not...and that issue also existed in the 7th Edition.
I think the rule really fits in the game well and hasn't been an issue at all (for me) when playing in the 8th Ed. What issues are you repeatedly having with the rule?