A Change to Spawning and Spawn Protection

I'm sure many people don't really like the current system of spawn protection. At times, it's helpful, and at times, it's useless. Here are my changes to spawning -

• 3 different spawns for each team. This was suggested somewhere before, but the spawns would be near to each other, to keep it from being too OP. Generally, clans will all spawn at the same area at the beginning of a match unless the majority of the team is one clan, or unless the team is very small. When you die, you will be spawned at the spawn point with the least enemies within a 20 block radius. (kinda like Battlefield)
• Complete invulnerability. You can still be knocked out of the map in some cases, and you either die or are stuck because you have that spawn protection. While protected by spawn protection, you are completely invulnerable. Bullets will go through you, and it will be like 7 seconds of god mode.
• Spawn protection disappearance when attacking. The issue with spawn protection sometimes is that you can't do a thing when someone attacks you with spawn protection, especially on a tiny map like Shipment. You're screwed, unless you can stay alive for 7 seconds.... pretty hard when you can't kill your enemy... The idea here is that you will lose spawn protection when you attack. That means shooting your guns or using a melee attack. This gives the person you're attacking a chance to beat you, although it is a small chance.

Those are my changes to spawning. Comment below on any improvements or whatever, and vote on the poll.

EDIT: Credit to @RLHchampion

• When the person with spawn protection fires, if he is carrying a shotgun, the damage of the shotgun pellets will be reduced by 1/2. For instance, the SPAS-12 fires 8 pellets which each do 2 hearts per shot. That would mean 16 hit points or 8 hearts. (not counting headshots) Their first shot will have half damage, so they will do 4 hearts not counting headshot multipliers.

 

Perhaps particle effects? Although that might lag some players. An alternative is to give them a custom name tag, "Spawn Protection" instead. Either that, or yellow armor.

Well, you can't really go OOM if you're invincible like what I have suggested here. However, you can with the current spawn protection.

As soon as the person with spawn protection fires a single shot, he loses that protection. So if he misses with a sniper rifle, he's done.
For burst weapons - will the whole burst have halved damage, or only the very first bullet?
Adding the rest, though.