If you implement a feature, people will most likely use it. Some more then others. If they don't want people to "spam" this feature called "jump", then they wouldn't have implemented it entirely. However, due to the high demand for this particular feature, they've implemented it anyway.

I am one of those people who /welcome this feature with open arms. No more walking around ledges you could've easily stepped off, or fences you could jump over.

Adding a "cooldown" to this feature will only frustrate people more then not having it at all. Example, if you want to jump across/over a "2 story slope", would you want to have to wait 10 seconds before making the 2nd jump? I sure won't. If it takes me up the stairs faster during a (for example) "speed run"? I'll jump to my hearts content.

"Bunny hopping" is something that will be "fun" in the beginning, but will die down for most people in the long run.

So, my answer is... No, i don't want a cooldown on the Jump feature. Let me use it whenever i want to use it.