It's a possibility. Good run with injuries over his career and Lukosius could make it a conversation.
For me it's less whether he's better than Buddy, as he's almost identical in play to Nick Riewoldt - he's just slightly taller and a MUCH better kick (as in elite or near elite by midfield standards). Not as one take overhead as Nick which he'll need to work on if he wants to reach that level of greatness. But he's still a capable mark and takes plenty, including contested. He just has that completely undefendable game. You almost need to have someone stay in the def 50m and someone up the field who picks him up as it's not realistic to defend him individually as per Nick Riewoldt in his prime. Hang back and he'll take mark after mark up the ground and drill passes to teammates or run with the ball himself. Follow him up the ground and he'll gut run back towards goal and take the mark inside 50m on you before you can get back, or if you somehow keep up with him, he'll then proceed to lead and take the grab before you can get your breath back to make any attempt to contest.
I don't see Lukosius kicking as many goals per game as Buddy. He could have a 70/80 goal season and several in the 50s and 60s, but you don't waste him so close to goal. You want him pushing up the ground and let him work his man over because kicking goals isn't the only way he adds value.
Overall, if he's Nick Riewoldt, that's a huge success, but also someone he is very capable of replicating the play of, in the way Jonathon Brown was able to replicate the play of Wayne Carey. Though hopefully Lukosius unlike Brown doesn't have the better part of his career ruined by injury and has a much longer prime.