The thing that has always jumped out to me with Shaw is the oppo% and I believe he will have to adjust. KB was an oppo monster in MiLB and almost completely removed it from his game in 2016 and intermittently found success thereafter. He likely found it more difficult to let the pitch travel against big leaguers, but Wrigley's preposterously deep RF and inviting LCF surely had something to do with it. I'm sure teams are gonna challenge the hell out of him to pull fly balls. Javy and Sammy hit a lot of oppo homers but there weren't many that had consistent success doing so. The Cubs are gonna hammer him with the league success of pull/oppo and we will see if his rates normalize a little more in MLB.
The MLB hitter he reminds me of is Matt McClain. He obviously had a lot of success in his one year, so we will see.