Somehow I feel we've been here before...
I was going to respond to each point but I think there is a basic issue here that is harder to cure.
Reducing the effectiveness of the starter bot blocks new players from participating in PVP.
That's not a solution, I know, but any changes to the starter bot needs to continue to allow new players to participate or you may as well just stop accepting new subscriptions.
I'm absolutely against the timed and/or cost idea. It was brought up before and its just too intrusive for the game to make you wait before you can play again and its totally feasible for a player to not have enough NIC to afford another starter bot, making the entire game unplayable.
You could limit how many skill levels can be used by the starter bot, for instance even if you have Nav 10 it will only go faster up to Nav 3. While you could do this, I can see this being an issue later on in the game when players with really advanced skills are able to defeat heavy mechs using castels, and the calls for capping that start. Its a very very slippery slope. This goes for limiting the armamnets too; since again a castel with tier 10 weapons and a driver with 400k EP is going to mop up bots.