There weren't any explicit suggestions here so let's do some extrapolation and form a few.
But first, I would caution people not to confuse "the way it used to be" with "realistic", and also to keep separate in their minds "slow" and "real". Preferring the way the game used to be is an entirely valid desire, and suggestions deriving from that desire are equally valid as any other. I have seen a trend recently, however, with many complaints and suggestions masquerading as cries for realism, when in reality they are not.
#4 Again not a suggestion, and I don't have one in terms of how you would implement an incremental movement speed-based system. I personally would not play a game that had such a system and I think such a system would probably result in an unrealistic experience. You don't think about how many miles per hour you're moving in a combat situation. Add to that number of keybinds such a level of detail would bring into the game.... no thanks.
But on the topic of movement... A resting-to-top-speed acceleration time of 0 flat is very, very unrealistic and I don't like that one either. It would be nice to see:
- Delayed movement speed ramp up - from all states to any other state (e.g. from resting to walking, resting to jogging, resting to sprinting, jogging to sprinting, etc. etc.). The total weight of carried gear should be used as a coefficient multiplier.
- The same mechanic used in the above suggestion should be applied to sudden stopping and turning. Stopping should not be instant, but should be impacted by the weight coefficient. Turning should have an arc forced on it when there is inertia, multiplied by weight coefficient.
- The weight mechanic is clearly already there behind the scenes, used to determine how much noise the character makes. That said, I realize that's only half the battle.
#2 Perfect example of a confusion of slow with realistic. Going from standing to prone can in fact in reality done much, much quicker than in the game. And you can even do it while firing an assault rifle. Yes, I do know from experience.
#3 Interesting one. I didn't know you could go to the hipfire weapon stance mid-roll. If that is the case I suggest disallowing that. Allowing weapon fire while rolling however, if that were removed I would be in an uproar. Nothing wrong with that aside from the certainty of a few ejected shells going down your flak vest collar and burning your neck.
I think in a very general sense though that before Bohemia were to consider any of these, or any further feature additions changes, the bugs that have existed in the game for years now should be addressed. E.g. the weapon raise bug and the bug where slots in inventory containers become unusable.