We need more throughput. It is that simple.
Right.
We have segwit now, and it is not enough.
Of course it isn't. Segwit just makes a little additional blockchain space available. The throughput will come from L2/L3 solutions: Sidechains, Lightning Network, whatnots. A multitude of L2+ solutions can be at work at the same time. That's where I hope to see competition for new ideas - not on the basic protocol, which IMO should stay as resilient and lean as possible.
If you have a better alternative than segwit+bigger blocks, feel free to share. Clonecoins would not even matter if we already had the benefit they chose to incorporate.
Just as an example of a better alternative, on this thread a few days ago someone posted a link to a new technology which could be plugged in at L2, just below LN and therefore pushing it to L3. It would allow opening multiple (shared) payment channels with a single blockchain transaction. The idea can be improved, but already as it is, it could significantly improve on the problem, rightfully bannered by Jbreher, of opening and closing a channel for every human on earth (impossible with 1 MB blocks. Or 2 MB, or 8 MB, for that matter).
It's not that I expect this particular gimmick to be the final solution, but it does show a lot of work is being done. A constellation of partial solutions can very well ease us into the L2 era. I think that's where the future is headed.