the best thing to do would be hold back on expension of fleet and/or routes
That, of course, is a matter of opinion and decisions like that I leave to those with more experience in running an airline.
Personally I still think Virgin is a small airline with much of the world left to exploit, and we lose business on certain routes where we don't offer enough flights to our competition who have more daily options.
However you may get your wish if the strike goes ahead and the company decides to downsize the operation to reduce costs. That, unfortunately, also means reduced headcount commensurate with that size business.