Hi!
Thank you for your kind words!
1. The index table actually indexes them both ways, so “walk-in” is indexed as “walk-in” and “walk” + “in”. The difference in results is due to the fact that typing “walk-in” will only match items which did have a dash, and the “walk in” will match also the ones having the keywords separated.
There are two ways you can address this. Either by using the keywords exception feature (simply put the dash there). If that does not work, there is a simple programmatical way too.
2. That is intended, and will stay that way for now. Unfortunately there are multiple reasons why it works like that, but hopefully we can change that in the future.
3. No, you can turn on this option. That way each synonym is also treated as a keyword.
4. Thank you, we will definitely consider this in a future release.