Let's have the context in mind when analyzing the situation.
The Sens have been on rebuild mode since they traded Brassard and Phaneuf at the 2018 trade deadine. All vets since have been almost exclusively traded for futures (except Duclair, Tierney, DeMelo, Boedker?), which results in a different way to treat prospects and the process to graduate them to the NHL. It gives you the luxury to take your time to develop them, which is why guys like Batherson and Brown have not fully graduated yet. On a strong NHL lineup that is up against the cap, incorporating cheap young talent might be a necessity and an easier thing to do because they would be surrounded by good established vets. There's a MAJOR difference in bringing Brady Tkachuk and Colin White to play with Mark Stone than Logan Brown and Drake Batherson to play with Chris Tierney.
Batherson and Brown could have been graduated already and could have been developping furthermore IN THE NHL, to the point that they would hold their ground pretty well. But that is not the goal with them, the Sens allowed them to dominate the AHL because they want them to be difference makers in the NHL. So this process was to put more chances on their side instead of throwing them to the wolves on a struggling team lacking experience and above average NHL players.
Batherson and Brown are NOT busts and won't be, the question is how good can they be, tweeners or top-6 forwards?
In Brown's case, there's going to be a number's game (Batherson as well but not as much as there is more Winger spots to fill), with the 3rd and 5th OA picks this year (Sens could pick 2 centers), with Josh Norris, Shane Pinto, Filip Chlapik and Colin White (and Tierney until he's traded).
There's many questions that still need to be answered to know what will happen with Brown, but he will have to beat most of them to be an offensive center on a team, if not he might be traded to a team that lacks talent at center
Only McAvoy right now. That second half of the first round is brutal
Chychrun is pretty good too