Yep, that’s definitely an option and something we’ve done before.
I’m not sure about that. The risk of work not getting completed on time and/or up to standard seems higher in this scenario than when giving upgrade work to newcomers that already completed their trial project successfully. If we use it sparingly, the approach may work, though 
Yes, these types of epics would be a good source of work for newcomers 
We’d just have to find/agree on a way to deal with sustainability implications. (The DevOps epics are usually on non-billable cell accounts, so if newcomers take longer to complete tasks than core team members would – which is not uncommon and understandable – this will impact cell sustainability negatively.)
We have an epic (SE-4957) but no owner yet.
In terms of capacity, Serenity could keep this epic or take the blocking FAL-2081, but not both. (This is after incorporating the capacity updates from Campus.)
Since Bebop has the most context on Grove-related epics at the moment it would make sense to see if we can find a way to move FAL-2081 to Bebop. As far as I’m aware, one potential option would be for @giovannicimolin to take it on (cf. this comment).