The reviews in Poka are based in a CPT and all the functionality is structured on this CPT.
If you are comfortable with PHP you can make all the changes required and make a page template as your review page but it’s not a simple change and requires a lot of changes in the theme.
But to be honest I can’t think of a reason why pages may suit you best and not the way it is made with the CPT.
You can change the slug for the CPT and also for the Taxonomy.
For example you can change the review/betfair -> online-casinos/betfair and list/best-online-casinos -> reviews-list/best-online-casinos
Also you can remove the slugs completely from the URL from both CPT and the Taxonomy (with some restrictions for this one)