If 2 episodes is a bit too little to judge that a series is bad, then it is also a bit too little to judge that a series is good.
If it's too early to review, then scrap all reviews including the good ones, and if reviews are expected, then selective deletion is just creating false advertising.
I would generally translate reviews based only on the first few episodes of a new series as "shows promise" or not. You really can't say more than that at this point.
