Eh. 5e's system is pretty flexible on party composition. As long as you have someone who can Healing Word, someone who can be frontline, and someone magic-y, you're fine. Bonus for having thieves' tools proficiency I suppose, but you can always brute force or get Knock.
There are vastly fewer debilitating effects in 5e that require a Cleric (e.g., Pathfinder's permanently blind/crazy and ability score damage/drain). Healing conscious party members is practically useless, further reducing the need for a Cleric. Anyone can get proficiency in thieves' tools through backgrounds, or training in-game, so a rogue isn't required.
