1) That makes absolutely no sense. They work almost identically, and most do function identically.
1) The similarities are nothing more than similarities, in the games, they work very differently.
2) 343 tried what you are suggesting, it was Halo 4, and it was probably the least played Halo game in the franchise.
- For instance, you couldn't just throw killstreaks in Halo, 343 tried a similar yet waaaay less exaggerated version, but I think we all saw the uproar when that was introduced.
3) Let's not repeat history, hm?
Edit: Also, a lot of the stuff on your list did not come solely from CoD, the jet propulsion was first seen in Destiny for instance, and the thruster packs were in development before AW was even announced. Sliding I saw in Crysis first, and I'm pretty sure CoD's and Halo's assassinations are not alike at all (Does CoD even have assassinations?). Just because CoD popularized these things, does not mean they came from it.
2) They had to ditch kill streaks because the way they tried to get it into Halo was incredibly stupid. The ordinance drops were completely random and not well thought out to say the absolute least. I think it's safe to assume the only reason they made the kill streaks the way they did in Halo 4 is because most of you would act like they committed a travesty if they didn't copy/paste CoD's kill-streak formula.
For some reason you embrace clamber and sprint, yet you act like ordinance drops was too much. Ordinance drops were the only truly different thing 343 has offered you yet. All these other "new" additions are nothing more than copy/paste mechanics under Spartan-like titles.
3) I truly mean no disrespect, but are you all blind? How is it that this community filled with people demanding evolution and full-out supporting copy/pasted mechanics, yet all the while trashing the one or two mechanics/functions, which 343i actually tried to put a unique spin on???
I'm absolutely shocked by the contradictory nature of logic displayed here. I don't care where these things came from. What does that matter? Does that change the fact that they both exist in these two franchises which we are discussing here? No! So, why are you giving me a synopsis of these things' wikipedia pages?
I suppose if you took out the much longer kill times, the hip fire accuracy, equal loadouts and lack of ordnance you'd have something much more akin to CoD.
Really, putting everything else aside, the things that make Halo, well, Halo right now are what I've stated above. And despite them not being a large list of mechanics, they still play a massive part in what makes Halo 5 play like any other Halo. My point on the mechanics being similar but playing differently goes a little like this in my head: You put two similar mechanics from each respective game on a white board, side by side, and it's clear to see that they are very similar, yes. But once you put them in the game things change, because of the fundamental mechanics of each game, it can almost completely change the way someone uses that mechanic. That's what I was trying to say.
And I do believe Halo should evolve, definitely, but, I think taking anymore from CoD at this point would not do the franchise any good. I don't trash CoD's mechanics, it's just the fundamental mechanics that you see shared with every CoD today would likely not work very well with Halo (Killstreaks, almost non existent kill times, customizable weapons etc, etc...). Really, I guess 343 could put them in a Halo game, it's possible, but I like playing Halo's multiplayer, and I don't enjoy CoD's multiplayer (not hating, I like the zombies, just never got on with the multiplayer).
Also, the point that Halo is using mechanics that didn't derive from CoD, is very relevant to this discussion, you're insuinuating that you want Halo to be like CoD, yet these mechanics are not CoD by nature, they were not created first for CoD, but like I said, they were popularized by it. So when you bring up Halo using a slide feature, I see it as Crysis inspired, since that did it first, not that it matters, really, I mean, staying on this point I could say, well hey! CoD has walking in it, thus Halo is similar to CoD because it also has walking in it! But what it comes down to is the fundamentals, and not messing with them too much.
I think the closest Halo you'll get to what you're asking is Halo: Online, but even then, that's going to have shields and hip fire accuracy as well.
Edit: Also, apologies for being a bit harsh, we're all passionate about Halo here, but there was no need for me to be rude.