That's a fair description as far as it goes, despite invitations for comparison to Bohnanza when they really don't apply. In Bohnanza, the restriction on changing the order of cards in your hand provides an incentive for everyone to trade and maximize the value of their hand. You don't have to trade, of course, but if you don't, you're going to end the game with tons of dead beans in your hand and no gold in your pocket.
In Colors of Kasane the restriction comes into play with you trying to push your luck while also deducing what you think the other players might do and which cards might still be in play. Do you score the pair now, or hope that the third card you want/need will be available on your next turn? Plus, since you can reuse one card from a previously played set, you do have some options for messing with card order — not that it makes things any easier for you...