It's the usual combination. Block size as much as makes sense, optimizations where possible, if lightning works (it won't) - use it. Gavin Andresen has publis

It's the usual combination. Block size as much as makes sense, optimizations where possible, if lightning works (it won't) - use it. Gavin Andresen has published about his latest work 'Graphene' which shrinks block sizes dramatically. They'll take/use any good ideas so long as it doesn't cripple basic onchain functionality.