You will have 137,500 miles (unless you also earned bonuses for adding additional users, or targetted spending). Without knowing how you intend to redeem I can't say for sure, but it seems likely that you will end up short (if you plan to redeem for first class) or with a remainder, and the Membership Rewards points would still be useful to top up the BAEC account.

Do you plan to renew the BA VISA or just use it to qualify for one trip?