I wanna toss my few ideas around as well like others have. I have played the game 16 hours according to steam and around that time about ten matches. In general I do like the game but it has it's own little flaws I would love to see fixed or changed so I will be covering those ideas in this and add some suggestions what would be nice in the game.
General game play
The weight systems, this needs a fix. It is not consistent at the moment and it favors "taking everything I can". What I mean by this is that it really doesn't pay off to reduce armor or to take a smaller weapon with you as there is no maximum weight the soldier can carry. To put this into perspective a soldier in the game can have a tor (~40kg + equipment and ammo), mg5 (31kg + equipment and ammo), maximum armor (helmet 5kg + plates ~5kg), vest or combat harness (2kg - 10kg) and then he can pick 2 anti-tank mines (each 10kg). So this totals to 100kg to 110kg of extra weight to carry. I hope you can see why this needs a small tweak.
Damage done by weapons. I will not say this for a fact but I feel there are some inconsistencies with them. Also the seems to favor shoot to the legs and gut for full damage while shooting the head or center torso seems to be a bit pointless at the moment cause the armor negates the damage. As there are no stamina system in place I have no ideas for the torso shots but the head shots should disorient the enemy player. If someone ask why I can come and demonstrate it to you with a baseball bat ?. Then we have certain ammo that just should kill stuff. Hitting someone in the heat with a 12,7mm (to americans .50cal) ammo should just kill you. Doesn't matter if it comes from a sniper rifle or a heavy machine gun. I know this is annoying balance wise but it's more irritating that a smaller caliber weapon kills you and you know that you could most likely survive that. Also I know this is not real life but as the game is trying to model stuff based in real life then something things just should be as they are and the devs should find another way to balance them.
Assets, I love these I mean I really really do but I can't figure out the cost of them also some things are broken. Some are way too expensive compared what you get. Lets take an example out of the hellstrike missile, 7500 points for one missile. Well you can guide it but that's it. So i would like to see a tweak in the assets cost. On the broken side I have noticed that if you choose 2 of the same ammunition type you will not get more ammo as you would expect to get. The grenade launcher needs a different "crosshair" or something, it's annoying to use cause of the fire arch and you cannot actually aim where you want the grenades to land, not saying the arc needs a change just the way how to aim the weapon, generally a different target figure (crosshair) has been used on these types of weapons.
Visuals and loadouts
Item weighs, some are not correct like a mag of 20 bullets weigh the same as a mag of 30 bullets. Some handguards weight clearly the same as smaller ones and they do not add weight to the weapon.
Lasers and flashlights, why cannot I turn one or the other on, I don't want to use both always at the same time and this would be a really really nice thing to have so I could but only one of from the combo unit.
stocks, why isn't there an option "no stock", you might not need it in certain loudouts.
The backpack, could we have an option not to have it on. I would go beyond this by making it an item required to have it with you to have certain items with you or to increase your carrying capacity but for starts could we just have an option not to have it on.
Gasmask should be allowed to use with a helmet.
More weapons, a lot more with lots of customization options.
Ballistic shields but no riot shields and they need to have a weights if added.
Visual configs should make an impact on the weight of the soldier. Cap weights a lot less than a specnaz helmet with visor.
Ability to tie certain visuals to certain loadouts. Yes I want to have a rambo model with me when I feel cocky.
With respect Krake