My main purpose for not wanting to move Robertson is that his trade value is likely trash right now. Like.. Lower than Liljegren's was a couple years ago probably when everyone wrote him off. So yeah you just have to hope that he stays healthy and figures out how to play in the NHL at some point. I'm less optimistic than many others just because, unlike with Liljegren, I question whether his toolset will translate in the NHL and wonder if his flaws as a player (tunnel vision, skating, puck distribution, size/strength, long wind up on shot makes it hard to get off shots so he needs to learn how to create a lot of space, etc) are too much to overcome.
But his shot is great and he should be able to be a big time scorer and it's worth being patient over. Because at this stage no team is gonna value him enough to give up a decent piece.