That's nice and all , however I suppose that BitcoinXT was the only project planning to increase the Blocksize of bitcoin (altcoin) .. now without what are we supposed to do with bigger blocks ? are Bitcoin Core developpers planning to do anything , if not there is no reason to continue using Bitcoin I suppose .. no mainstream = no future .

Look for
Scaling Bitcoin workshop, it is meant to address scalability at least mid-term.
The answer is already here. Increase the block size and if Core takes to long to do it then an alternative implementation of Bitcoin will. This is not the same as an altcoin, embrace the freedom of choice. If enough people want the block size to be increased then it will be increased, even if that means we need to fork away from the Core development team.