Because when an idea works, people love it and want to see more of it.
This is stupid. Shouldn't we expand on the idea? Nope, gotta have the same old stuff... People just want a literal carbon-copy update of Final Fantasy VII and Melee. Oh, and when developers try to change up things, it's like they just killed thousands of kittens in front of them. REALLY? This is why I like Final Fantasy XIII, XII, and X because they changed the combat and I'm sure as hell going to like Type-0 and XV. Oh, but it's not a Final Fantasy game. Really? None of the Final Fantasy games stuck to one idea besides the theme of crystals.
Ratchet & Clank changed things up with "experimental" games: All 4 One and Full Frontal Assault which were decent at best games and bad Ratchet & Clank games, however, it's cool that Insomniac Games tried things out. Resistance was a cool concept, but it never interested me enough to play them. Still, the concept was cool since most shooters weren't and still aren't like Metro 2033, Resistance, and Spec Ops: The Line. Same with Fuse. Insomniac Games were stuck making Ratchet & Clank for years; give them a break if they only know how to make Ratchet & Clank games. Letting them try things out leads to stuff like Sunset Overdrive.
Core mechanic-wise, I can't say for Melee, but the fact that Melee and Brawl were horribly balanced and had like a fraction of the cast who were good, a fraction who were barely usable, and the rest were utter trash is something to mention when people say they want another Melee. Remember Ganondorf in Brawl?
I'd be cool for a game with Final Fantasy VII's mechanics where you could slot materia in weapons and stuff, but I'd rather not have FFVII especially with people whining about how everything Square Enix makes is ****. I'd be cool with a SSB game with Melee mechanics, but I do not want Melee's balancing.
Hell, people are complaining about how open Zelda Wii U is when they complained about how linear and locked in Skyward Sword was.
I hate people.
Kiting ruins so many action games. I mean you get away with so much BS by doing that, and it's boring as ****.
Kiting's mostly used in MMOs and RPGs which aren't really action-y, especially old ones since AI weren't good back then and kiting exploited the hell out of the games. The other thing is that RPGs are generally limited in what you can do. You can't dodge, jump, combo fast enough like in Devil May Cry to kill certain enemies at a low-level. So, kite, shoot some spells, kite again, and repeat. With some poorly-designed games, you are forced to kite to reliably win.
Baiting's another story since it's more like being a hunter or a predator who draws enemies away to murder them.