A dead adc and support should not equal your tower down at level 4...
It's too ridiculous how a full wipe out on bot goes on to be a tower down. I've seen towers go down at 7-10 mins just because bot lane got a full wipe out on bot. It's just too fast for a tower down and I think towers need buffing. Right now, they are papercrafts shooting spitballs. There should be risks for diving so early. I don't know how jg, adc and supp can "tank" a tower at lvl 4-7 so well when they 3v1, they attacked all at once and a single champ got shot once??? It just does that tower lock on with the target not getting shot in the zone for 2 seconds... I was at 3/4 hp and half their attacks missed in progression. I think towers need to punish early fail diving, maybe shot speed up or so. Also early siege defense would be good.