I can live with milik staying this season, I just don't trust him to be readily available when called upon and given we will be fighting on multiple fronts this season.
A back up striker is rarely ever going to increase the quality all that much, not unless we look back to the days of when we had the likes of Di Vaio riding the bench, I would feel a bit more confident going into this season with a capable and reliable enough backup. We will have to see about these false 9 options, personally I'm never sold on the idea.