Wow, you mean Alexa and Chris with Aljona? (Since Alexa and Chris are clearly together for the long haul )
That seems a little harsh, when they're just starting, and by their social media posts they have a mutual admiration society:agree: The only thing I can see is geography, since Alexa and Chris are not going to move full time to Europe, Aljona would need to accommodate that....
Besides geography, the biggest obstacle I see would be that Aljona and Bruno are still doing a good amount of show skating. I guess that's partly why they'll also work with the other coaches, but it could still make things more difficult.