Thank you for the replies, all interesting. I agree that the githyanki should be formidable warriors, and that they block an area (path to moonrise tower?). The goblin camp, also blocking the path to moonrise tower, can be taken out with a 4th level party with a little help from Halsin. Still challenging, but more balanced. I argue however, that the githyanki should not be encountered before 6th level, unless they are somehow made less powerful. Perhaps the number is reduced to 3, which in the full release would mean you (4 5th level characters probably) versus what is in effect 3 7th level charcters then, still tough, but more balanced. And I don't mind tough unbalanced fights along the way with some treasure reward, as long as they can be avoided without missing an important part of the main story. And if for some reason you are one of those who find all the fights too easy there will probably be a level hard, or super hard, for you.
I know there are probably ways to win the fight but: They all exploit weaknesses of the game rather than weaknesses in your opponents. Having Lae'zel disarm 2 giths? She could easily be dead before getting the chance. But let us not discuss the fight, I know some have found a way to beat them and thus find it easy. A debate about whether it is an easy fight or not would be long and fruitless. I don't mind fights where you have to rethink your tactics and be clever, so it is not about that. It is about balancing.
I am also aware that in the full release you could just wait until you are level 6 (exploring the underdark), and then come back and beat the githyanki, but story wise it feels awkward.
