Barring a change of BattleTech universe focus, I wouldn't imagine that we see a significant rise of WarShip numbers. As a literary choice, the Two-Power Standard navy of the pre-War of Reavings Snow Ravens was fun and fine, but I doubt that we'll see a "Ravens increase WarShip navy from 17 to 30!" event. If more WarShips appear, I would predict that the Ravens may gain a single ship of a brand-new class. Better for TROs, better for story, better for dynamic change in the universe, and better for not breaking faction balance.