Short answer: YES, syndicates are worth it.

Is Syndicate worth playing?

Assassin's Creed Syndicate has been out for six years now, and it's still worth playing even after all of the franchise's major changes. ... Below the surface however, Assassin's Creed Syndicate is a truly worthwhile experience that represents what made the franchise so popular to begin with.

What's the point of syndicates Warframe?

Syndicates are Warframe's faction-based reputation system, players can make allies with them, earning experience and rewards for playing missions. The more time a player dedicates to a faction, the better rewards they can begin to earn.