As all the OW hubs are on the periphery of Europe, having a central European hub has some potential -- but isn't useful until there is more TATL service to BUD. AA adding ORD-BUD or DFW-BUD would change things quite a bit. MA seems intent to focus on short-haul, though it is increasing long-haul fleet by 50% (from 2 to 3 762s). But it will never be a significant percentage of OW.

Meanwhile JL increases the size of OW by almost 20%. The poor hub situation in Europe means that JL is more likely to offer service to cities in Europe than to route onto BA at LHR or IB at MAD. But as you've noticed the route maps and schedules have yet to be integrated into OW (partly deliberately, as some of the integration requires anti-trust immunity).