It would be great if they added more custom options in the "soldier" settings for portal such as scope glint so we could make experiences more arcadey or more like a milsim beyond the current options.
Some settings I'd like to see are
parachutes - on, off,
pilot parachutes - on, off
zip lines - on, off,
fast ropes - on, off
jump - on, off
jump height multiplier
vaulting - on, off
BF3 suppression (I know its not in game but it would be nice to be able to turn it on) - slider for multiplier so you can have it as 10% of what it is in BF3 or go up to 10x what it is in BF3.
Accuracy multipliers for weapon types - so you can set an LMG to be very inaccurate if using ironsights when standing or walking, but more accurate to different degrees for when you are crouched, prone or using a deployed bipod.
Damage multipliers for weapon types.
Explosive damage multiplier
smart scope pinging - on off
squad spawn - on off
squad leader spawn - on off
melee takedowns - on off
global gadget cool down - multiplier
Also some extra game mode settings -
Ticket bleed multiplier for holding flag (ie how fast do enemy reinforcements deplete from holding majority of sectors)
Ticket bleed multiplier for capturing flags (ie how many reinforcements deplete when you take a sector / flag, I think its 10 in normal conquest).