Yep, a new 20 goal-a-season striker would be most welcome, as he would have been last season. Even if he turned out to mainly score those Xg expected goals, he would still occupy opposition defenders leaving space for others.
If he doesn't turn up, I'm sure the club have been working on a plan B, so I remain hopeful another goalscorer(s) will emerge from the existing squad. Someone else mentioned that Lamptey should play further up the pitch. I put forward that suggestion last season, before he got injured. If fit, and up to full speed, he would terrify full backs, create a lot of chances and get us a few penalties.
That's exactly what he did last year.
Playing further forward would give him less space to run into. Although I think he could play a more advanced role, if it ain't broke, don't fix it.