You sure you played the Halo 5 beta? because a lot of what you said is out right wrong, clearly you didn't watch a lot of the pro players on the beta, and did not see the final points after the beta end by 343. So I'll reply to each point one by one.
As much as you don't like sprint, don't try and force this idea that "many" do not want sprint, as made evident by 343
"The results from the HCFP surveys showed that nearly 11% of HCFP participants felt that Halo should not have sprint.".
You are BEYOND factually incorrect here, there have been a few notable skill jumps as made clear by a few pro players if you watched them play, such as on Truth, you can jump from spawn all the way to the mid platform using a very difficult
sprint, jump, attempt ground pound, cancel around, clamber combo. Here are the specific videos of these new skill jumps demonstrated in Halo 5 (
https://www.youtube.com/watch?v=eodZ4AjEx38&spfreload=10 ,
https://www.youtube.com/watch?v=KA7vr6hr3JI ).
Also as seen in the Halowaypoint post H5 beta article,
"Modify Ground Pound controls to prevent conflicts w/ crouch jumping". Clearly showing that crouch jumping is still an alive function.
Although I do agree the strength of these automatic weapons are a bit too much, especially in mid range (primary due to the smart-link benefit/ ADS). Again if you bothered reading the 343 post
"Reduce bonuses for automatic weapons in Smart-Link & w/ headshots". Honestly I like the direction of auto weapons actually being a worthwhile choice.
Also it's still clear in many H5 beta matches with pro players
BR is still king.
You are not even giving a logical argument to why the new rankings is not good. "Not simple enough", what exactly does this mean. There are different ranks/leagues you are placed in after 10 matches within the game mode, then you are rated after each game with a number to represent how far away you are from the next league.
This is a clear, effective and frankly the best way of ranking so far. It's working with HIGHLY competitive games everywhere (SC2, League of Legends etc...). Only issue was ranks barely worked in the beta.
Please do consider watching Flameswords "Road to Halo 5 Beta Pro Ranks" on youtube.