I really like the idea of a customization system, blur in sights/optics not only scopes, and also the
fully modeled hands/legs (?) in vehicles. But some things like the configurable EOTech and headlights are not really necessary. Not really sure about magazines being dropped into the ground as actual individual models like bullet cases, or weapons also being dropped when killed (which is just like PR's current kits which LOOK like weapons and helmets but essentially the same little bags from vBF2... except that these seem to be affected by physics).
EDIT: Just had an idea. What if the ATTACHMENTS were limited, instead of the kits themselves? PURE BADASSSARY.
Just think about it.
Currently there are these PR kits (for conventional factions. With insurgents and taliban it would be pretty much the same as it is today. Special kits must be picked from the floor, etc. Read further to see my thoughts about it). Almost all of them have scoped variations... in fact, I think Crewman, Sniper and Pilot are the only ones that don't:
Rifleman
Rifleman AP
Rifleman AT
Automatic Rifleman
Granadier
Anti-Air
Medic
Sniper
Officer
Marksman
Pilot
Crewman
Combat Engineer
Anti-Air
Total: 14 kits. 25 scoped ones, which would be eliminated with this system being used.
If we made attachments limited in the menu (they could just be marked red or some other color, and give you the usual 6000 respawn time if you selected them just like it happens today with Medic, AR and Officer kits, we would be able to continue to enforce restrictions like the current ones and avoid things like medics with scopes)
What if special equipment would be selectable in the customization screen as well? You may have noticed that there is a "select weapon" box in the AP video/image (which would be very useful for Officers for instance.
A USMC officer would be able to use either an M4 or a M16 if he wanted to, while a Taliban one would be able to choose between a Galil and a FAL in that same screen. Not really needed for choosing between an AK-47 and a 74 as insurgent, I believe), and another empty space to its left. We could use that space.
Imagine, you select a "Rifle" kit. Without selecting any special equipment, it is just a rifleman kit. There is the menu for scopes and, maybe, skins, barrels, etc... ok, we don't need to go that far

. Just scopes/sights, maybe. Below there is a box with a Medic bag/icon/whatever. If you select it, it becomes a medic kit, and you are no longer allowed to use scopes. You gain all the extra field dresings, ressucitate, first aid kit, etc. We could have simple icons indicating this in the same way they appear today. The same system can be used for the Granadier, Rifleman AP, Rifleman AT, AA, Combat Engineer, and Officer kits, except that Medic and Combat Engineer are the only ones which suffer from such attachment restrictions (we would need to find a way to insert a scrolling bar there, if not the whole system would not work). Using USMC as an example, that leaves us with just 5 "base" kits:
Rifle (M4/M16, since the M4 is also used by the USMC Crewman kit [and US Army as well, I think], in this case it would be included)
Automatic Rifleman (M249, might need to rename the kit)
Marksman (M21/M14. Would be also useful since we would be able to choose between scoped and non-scoped version easily.)
Sniper (M24/M40)
Pilot (M9)
However, in most other conventional factions, the Crewman kit does not use the same weapon as rifleman and etc do, like in MEC (MP5 instead of G3), UK(L22 instead of L85), IDF(Galil instead of TAR-21), etc.
Using MEC as an example, we have instead 6 base kits.
Rifle (G3)
AR (MG3/HK21 as well, considering we would not be restricted to 2 variations per kit? Would be very nice)
Marksman (G3-I-don't-remember)
Sniper (Also can't remember)
Pilot (Oh man, what is wrong with me today?)
Crewman (MP5)
We might also add Officer as a separate one just to make it more distinct and spare SL's/Commanders some time. Considering all uncoventional factions have more than one weapon for their officer/cell leader kits, maybe we should standardize this and add the Officer kit separetely for all factions. In the USMC case, that would leave us with 6 base kits, and 7 for MEC, IDF, UK, etc.
Hence, the biggest advantage of this would be the ability to spawn as a Granadier and other kits. Would be really interessting when you spawn at rally points. The ease to change between sights (in case we let players choose only between them) would also be nice, specially considering the ability to choose between EOTech, iron sight, ACOG, Aimpoint, etc, in most kits. Maybe it would affect gameplay, maybe not. Maybe it is really necessary... maybe not.