I am not with increasing the block size, that was just a one-time incident and it's very rare for pools of transactions to accumulate like that, normally my even small transactions doesn't need more than one or two blocks to confirm. I think the current system already proved it's efficiency overtime. No need for a very big change currently.
If a mega merchant as Amazon is accepting Bitcoin as payment option, then all blocks will be full nearly instantly. That might be a reason for them NOT to accept Bitcoin payments as 1MB is simply not enough. 2MB is what we need if we want to attract mega merchants.
Agreed. I think that's why it isn't time for that step in bitcoin's evolution yet. We have to create the infrastructure first allowing a huge increase in fast transactions before Bitcoin will be considered as a payment option by market giants. I'm willing to wait until April/May to see if anything useful and realistic can come out of LN or whatever trick there is to allow more transactions. One thing is for sure: Bitcoin isn't ready for large fees at this point of its development!