So far, I have not enjoyed Hallberg as Romeo or des Grieux although I did feel he danced better in Month than I had anticipated. I do expect him to be better suited to the danseur noble roles in Sleeping Beauty and Swan Lake.
I have also wondered if Hallberg might not do better with another partner from the company and I think potentially it could work well with Cuthbertson as suggested in posts above, although that does not seem to be on the horizon at this point.
I would much prefer to see Osipova with Ball or Muntagirov - or Corrales, who I think are a better match for her dramatically and who partner her more securely. I don't think the "fire and ice" trope, which seems to be the recurring theme of the way Osipova and Hallberg have chosen to be presented in the media here, actually works in MacMillan - or does not for me, anyway.
(I am still non-plussed at the failure to invite Shkylarov back for Manon with Osipova - if a guest was to be invited for those performances surely he was the one, but I am at risk of repeating myself so will end on that note!)