I have no problem with the SAs, but an ability shouldn't be required for any specific section. You can go through 99% of Halo 2 without jumping*, yet the player still has that in their arsenal.
*It may be possible to do it 100% with a grenade launch, but I'm not sure.
And now you're talking about mission design, so it's kinda clear to me you just need something different. Here's my advice: play Half Life. Or just quit trying to
get a franchise to change what it is about to meet your demand.
... Yeah, of course people would be complaining. Quite a few of the people I see complaining about the changes aren't able to put it into words, so they just default to "it looks like a dinosaur now". The reason why I don't like the change is because there wasn't any logical reason to change it. From a canon perspective, a design perspective, a combat perspective, the redesign falls short of logic. For political reasons, there's the obvious one which is 343i wanted to put their mark on the franchise or that the art team wanted it to be different from before. Aside from that, there isn't a reason for change that is cohesive. If they just came out and said, "We're changing the character models for [something logical]" then I'd be fine with it. Instead it was the usual 343i/MS PR spin "These guys are like the Skirmishers... You know... A different species... You know...".
ME3 isn't good, but hardly the worst game of the generation. Lime(I think it was him) had a post that summed up all the issues about ME3, and it's why I don't consider it a good game. Sam Raimi is a terrible writer, but a good director. Darkman and SpiderMan 3 are the big titles on his writing list, and both of those are terrible.
I hate how people try to misconstrue the Golden Triangle to be 3 things that are important to Halo. The Golden Triangle was and will always be a sandbox balancing concept.