Suggestion for all damage over time abilities

Recently after the Talon rework I really started to think about how his damage over time ability (his passive) works relative to the other dots in the game. He has one of the only damage over time abilities that proc multiple times a second as opposed to the other damage over time abilities that proc once per second.

I don't know about anyone else, but I wish that the other DOTS would function more like talons passive, it just feels super clunky and awkward for abilities like karthus E to be doing procs of damage each second, rather than constantly.

The only real reason I can think of for this kind of mechanic is to keep items like or thunderlords decree from becoming too overpowered. Even then I think that the problem can be avoided by making it so that Dots will only do a stack of thunderlords or frostfang each second. Even then, most champions who have DOTS run deathfire touch instead of thunderlords.