I think they can keep the round duration the same or at worst bump it up to 20 minutes, but most matches don't last 15 minutes anyway. I'd rather that 'quick' play matches not take 30 minutes, but I'll probably deal with a 30 minute match if that makes it better.
The thing is they'd need to set an absolute floor for Drop Deck tonnage say - never go below 240 or 250 tons and set the drop deck packs at that weight limit or else you're gonna get complaints of purchased drop decks being invalidated. All drop deck packs must be usable in a drop deck at all times despite tonnage changes so don't change it below that standard.
As for extras... I don't know. Maybe set it so that drop deck packs give an extra 10%-20% c-bills, xp and loyalty when used together. Go figure something out.

As an extra note, non-paying players would be able to make multiple accounts for drop decks without worrying about progress lost from not being able to transfer modules over from multiple accounts once the 3-to-master rule is gone along with modules. 1 account - 1 drop deck and no need to worry about mech bays limiting your pokemech fun. The only limit is you can't mix and match mechs from different accounts which is still a good enough reason to keep it all in 1 account and buy some mech bays.
