I think it's because Seney kind of is what he and IMO fizzled after starting out really solid. Bastian has the draft pedigree on his side for this stuff too.
Bastian is also 2 years younger than Seney. I can see him carving out a role on this team using his size to pick up dirty goals and be a net front presence on the PP, similar to what Boyle and Maroon (and now Simmonds) have done.