Relic shield needs balance

I've been playing Twisted Treeline lately and theres a trend like how in Summoners rift that both partners buy relic shield. I think this needs some attention because as someone whos playing its annoying to have both players have a heal from insta-killing minions at a certian amount. also I think only one person on a team should be able to carry a support item like relic shield since it can break what it was originally meant for. thanks.