So Elasticsearch is enabled, it's reindexing as we speak, so searches might not work as expected until it finishes. But it's speedy, so looks like should be done in about 5 minutes. You can then test it out for two character searches and for relevancy.
Can you give an example? I tried just now searching for https://uk.yahoo.com - which is the link text for the above link and it works. One thing to note is that there's a choice between relevancy and date for the order the results are given. I recently turned off the bias towards more recent posts for 'relevancy' as it was failing to bring to the surface a lot more relevant results from years ago.
Yeah for some reason on new posts, you have to search the whole domain including sub-domain, ie. pamm.bluemaxcapital.com works, but bluemaxcapital.com doesn't - however, for old posts (before the migration) it does work, eg. trading-tools.com does show up even when there's a url with www.trading-tools.com - so it has the capability, just for some reason it's not picking that up.. I'll need to investigate further.
Let me know your thoughts on the relevancy without the bias to newness, if you prefer it that way.