This post is for those genuinely interested in residing under LN as 2nd layer, with self-custody. Any completely new users I'd probably have them look at ecash instead. 
With this current setup, I pay at most 1 sat for zaps. A zap of over 1300 cost me 3 sats when going through Olympus.
Indeed, it's not perfect but personally I think it's worth the self-custody.
As mentioned in the post, anyone is free to open a channel to any other LSP if they choose to do so - Olympus is just built-in, it's easy, and gets people going.
This is more of a prelude to ecash which I'm looking to write a post on soon, which does away (for the most part) with the limitations of liquidity and fees.