Would the NFL be better with no kickoffs?

i think they want to move the kickoff spot to the 25 actually, but either way, its stupid. i mean i get the player safety and everything, but i mean look how many people make the team just because of kickoff. its mostly 2nd and 3rd string guys playing those positions. it will reduce the roster DRAMATICALLY. and whats the point of having an offensive and defensive line then? and where will they start the ball?