I think that it would be great if the 63 could be extended through Honor Oak. However, I expect that the response to Brockley Rise as a proposed terminus will be that there is insufficient room given that the 172 and P12 already terminate there, especially since there are so many 63 buses (every 5 mins at rush hour).

An alternative terminus could actually be Bell Green, via Honor Oak, Brockley Rise, Stanstead Road, Waldrum Park Road, Perry Vale and Perry Rise. This would have the added benefit of improving bus services on the east side of FH too.

Dunno about the N63 though!