but the latter doesn't have any hidden drawbacks with inconvenient information
The Hanging Gardens look interesting, but it's a very distant prospect.
Looting Anumar... Well, formally, if Min joins you to loot him, there are no problems with him (not counting the guards). But in reality, it's small and pointless, and also risky. It's better to look at Anumar as a potential enemy if the squad will be helping the Sun Clan... After all, the snakes are immune to control, which is what the clan specializes in. So a conflict with the Sun Clan is more likely.
And I would choose between the Sun and the Hand when it comes to recruiting from Hekkelia, yes.