It's just 1 extra HP per second
You people really do love to bitch don't you? 
You people really do love to bitch don't you? 
Over a 5 minute portion of the lane phase, that's an extra 300 hp, comparable to 2 hp pots. I'm not saying "OMG SO OP PLS NERF", just that hp regen does make a difference in laning.