Harken back to the days of THP from ranged kills!
Assumption: Ranged killing is efficient, and functional enough in V2 (with the proper kits) to kill most of what is on Cata map creating a minimal need to enter into melee combat. All things equal, ranged combat is preferrable to melee.
Historical informaton: When THP was equally available to ranged and melee. Ranged was preferred. This is probably because ranged is much safer, there is no threat of being hit.
Theory: If THP generation is not strong enough to routinely generate a full health bar, ranged will once again be preferable.
Historical information: One of the greatest complaints against flamewave staff and drakegun were that they “ate” all the temp health from horses.
Theory: Given that THP on kill is preferred now. Bounty hunter, ranger Vet, and huntsman will all “eat” the temp health from non CW elites.
Prediction: This is leading to a new ranged meta where melee is viewed as very dangerous, and more ranged classes being used makes THP generation nearly impossible for on kill THP users. The resulting low THP for all environment will further reinforce a ranged meta. Only strong on stagger generators will routinely be used for melee.
The solution to this is to weaken (not strengthen, i.e. lingering flames) ranged output, and ammo regeneration, and to provide THP on cleave with a boost that puts it on par with on kill THP. Both of these will incentivize more melee.
I know that nerfing anything at the moment will not go over well with most people. While I have zero struggle in legend or cata, I did run somw QP yesterday and the struggle is real. So, this should be framed as the relationship betweem ranged output and THP in melee.