I actually like it as it is right now.
And there is a method to bypass spawn killing and that is staying on the respawn platform, or try to jump off from there to another teammate.
But being in the enemy's base, means that you are one less person to defend your own, so striking your enemy base and camp somewhere near it, seems very inefficient in this game, wich i like cause it will give inexperienced players something to counter by avoiding conflict against the other team.
The fact that you don't have to engage any of the opponent makes it possible for anyone to change the game.
I find this to benefit casual and competetive players alike, if something is removed, it's possible that the game itself may not be that enjoyable anymore.