If you let TB change the MEID then you'll have problems updating the phone.
Let's say P1 is your original phone. Then you restore a TB on P2 then P2=P1. You'll have P2 unable to do a profile update or have the prl update by itself. Further. If for any reason Boost has to change your number (or you request your number change) then the phone will be unable to do that update.
P2 will always be dependend on P1 for updates. Without a working P1, P2 will be useless.
On a side note I seriously doubt if TB can do a MEID change just like that. Keep us posted as to your experiments.
Mountain Dew makes me happy.
If I've helped you, a thank you would be cool.