This was my first impression of what the Lightning Network was developed for and that bigger transactions would still be done on-chain. In your view, would you say 1 bitcoin is a micro transaction?
For me, it isn't. Even developers are aware that keeping large amount of bitcoins on the LN is a risky idea. I don't see anything wrong in opening channels with large amount of BTC. Their owners must be aware that they might lose their money and they can't send all of it it to because split-payments are still not implemented (the amount of BTC in channels opened with other people limits them).
Oh, I almost forgot. Currently, you can send only about 0.04 BTC at once, so 1 BTC LN transactions are not possible anyway.
But I believe if there are enough connections among nodes in the network, routing payments will still go through but maybe with slight delays?
As long as there are enough connections and funds in the channels then small delays (still lower than the time between each mined block) might occur.